Play Audio to a BT Device on a button press

[subbamaggus]

my current setup looks like:
download a file from an internal webserver (home net)

init everything

play the sound on a button press.

basically i got everything up and running.

But: the usage of the callback does not really work the way i expect it to.

in the setup i use:

a2dp_source.set_data_callback(get_sound_data);
a2dp_source.start(btDeviceName);

and in the isr i just set a variable (pressed) to true.

the loop looks like:

    if(pressed) {
        Serial.println("button pressed");
        playbackDone = false;
        a2dp_source.start(btDeviceName);
        pressed = false;
    }

my callback looks like:

int32_t get_sound_data(uint8_t *data, int32_t len) {
    if (playbackDone) return 0;
    if (!audioFile) {
        Serial.println("loading file");
        audioFile = SPIFFS.open(filePath, "r");
        if (!audioFile) { Serial.println("Error opening audio file"); playbackDone = true; return 0; }
        audioFile.seek(44, SeekSet);
        Serial.println("file loaded");
    }
    int bytesRead = audioFile.read(data, len);
    Serial.printf("len %d\n", len);
    if (bytesRead <= 0) { Serial.println("Playback finished!"); playbackDone = true; audioFile.close(); return 0; }
    return bytesRead;
}

i guess there is more going on. since i dont see a reason in the documentation how the callback should be used.

i will change the loading of the file to a buffer... but first i would like to understand the callback.

do you have a hint for that?

[pschatzmann]

Your code is impossible to read: please use the proper code formatting provided by Markdown!

In any case, you need to feed the requested number of bytes as described in the Readme Chapter Sending Data from a A2DS Data Source with a Callback: if you have nothing just initialize the array with zeros.
If you have a file, you need to sequentially provide the requested data from the file and at the end, fill the remainder with zeroes.

Here is an example that processes an mp3 file!

[subbamaggus]

sorry, it was my first discussion. i was not familiar with the formatting.

i guess i am pretty close.
just the reocurring "button press" to replay the same file again and again might be the issue.

which is not in your example

[subbamaggus]

I narrowed it further down.

the
a2dp_source.start(btDeviceName); is not needed in the loop() everytime the button is pressed.

the callback is called the whole time.
So i guess i would load the file in setup, copy the data to a buffer.

just the callback needs to set its pointer back to start everytime the button is pressed.

for the moment, i will have to read into the handling of this behavoir.

[subbamaggus]

i guess the buffer example does not help me. the way the callback works might be the confusing part.

i attached a button to pin 18, and this is my souce.
using the buffer as in https://github.com/pschatzmann/arduino-audio-tools/blob/main/examples/examples-communication/a2dp/basic-player-a2dp/basic-player-a2dp.ino

but i guess the way the data should be treated is different.
the buffer is basically fixed. the example is about a stream.

i will try further.

just for completeness, here my try.

#include <BluetoothA2DPSinkQueued.h>
#include <BluetoothA2DPCommon.h>
#include <BluetoothA2DPSource.h>
#include <A2DPVolumeControl.h>
#include <config.h>
#include <BluetoothA2DPSink.h>
#include <BluetoothA2DPOutput.h>
#include <BluetoothA2DP.h>

#include <WiFi.h>
#include <HTTPClient.h>
#include <SPIFFS.h>
#include "BluetoothA2DPSource.h"
#include "esp_task_wdt.h"

#include <Arduino.h>

const char* ssid = "MYSSID";
const char* password = "MYPASSWORD";
const char* fileURL  = "http://www.sasemdusem.de/response.wav"; //use your local server ip and the open port
const char* filePath = "/response.wav";
const char* btDeviceName = "MYBTDEVICE"; //use the name of your bt device


BluetoothA2DPSource a2dp_source;
File audioFile;
bool playbackDone = false;
int counter = 0;

const uint8_t buttonPin = 18;
volatile bool pressed = false;

void ARDUINO_ISR_ATTR buttonISR() {
    pressed = true;
}

bool downloadFile(const char* url, const char* path) {
    Serial.println("downloading file");
    HTTPClient http;
    http.setTimeout(10000);
    http.begin(url);
    int httpCode = http.GET();
    if (httpCode == HTTP_CODE_OK) {
        WiFiClient* stream = http.getStreamPtr();
        File file = SPIFFS.open(path, FILE_WRITE);
        if (!file) {
            http.end();
            return false;
        }
        
        uint8_t buff[1024];
        int len = http.getSize(), total = 0;
        while (http.connected() && (len > 0 || len == -1)) {
            size_t avail = stream->available();
            if (avail) {
                int c = stream->readBytes(buff, min(avail, sizeof(buff)));
                file.write(buff, c);
                total += c;
                if (len > 0) len -= c;
                Serial.print(".");
            }
            delay(1);
        }
        Serial.printf("\nBytes received: %d\n", total);
        file.close();
        http.end();
        return true;
    } else {
        Serial.printf("HTTP error: %d\n", httpCode);
        http.end();
        return false;
    }
}

int32_t get_sound_data(uint8_t *data, int32_t len) {
    Serial.print("#");
    if (playbackDone) return 0;
    
    if (!audioFile) {
        Serial.println("\nloading file");
        audioFile = SPIFFS.open(filePath, "r");
        if (!audioFile) {
            Serial.println("\nError opening audio file"); 
            playbackDone = true; return 0;
        }
        audioFile.seek(44, SeekSet);
        Serial.println("file loaded");
    }
    int bytesRead = audioFile.read(data, len);
    Serial.printf("len %d", len);
    if (bytesRead <= 0) {
        Serial.println("\nPlayback finished!");
        playbackDone = true; 
        audioFile.close(); 
        return 0;
    }
    return bytesRead;
}

void setup() {
  
    Serial.begin(115200);
    delay(1000);
    esp_task_wdt_deinit();

    pinMode(buttonPin, INPUT_PULLUP);
    attachInterrupt(buttonPin, buttonISR, RISING);
    
    WiFi.begin(ssid, password);
    Serial.print("Connecting to WiFi");
    while (WiFi.status() != WL_CONNECTED) {
        delay(500); 
        Serial.print(".");
    }
    Serial.println(" Connected!");

    if (!SPIFFS.begin(true)) {
        Serial.println("SPIFFS mount failed, formatting...");
        if (!SPIFFS.format() || !SPIFFS.begin(true)) { 
            Serial.println("SPIFFS not available");
            return;
        }
    }

    if (downloadFile(fileURL, filePath)) {
        Serial.println("Download completed successfully");
    }
    else { 
        Serial.println("Download failed");
        return;
    }
    
    Serial.println("Initializing Bluetooth...");
    a2dp_source.set_data_callback(get_sound_data);
    
    Serial.println("waiting...");
    delay(2000);
    
    a2dp_source.start(btDeviceName);
}

void loop() {
    counter++;
    
    Serial.printf("-");

    if(pressed) {
        pressed = false;
        Serial.println("\nbutton pressed");
        playbackDone = false;
        //a2dp_source.start(btDeviceName);
    }

    delay(500);
}

[pschatzmann]

You are thinking way too complicated!
Just do something like the following:

File file;

// this will play as soon as you open the file
int32_t get_sound_data(uint8_t *data, int32_t len) {
   // when no data: return silence
   if (!file) {
        memset(data,len, 0);
        return len;
   }
  // return data from file
   size_t read = file.readBytes(data, len);
   return read;
}

If you have a wav file at 44200 samples/second, 2 channels, 16 bits, just open it and set the start position to 44 to ignore the wav header. Otherwise you would need the wav decoder provided by the AudioTools.

void loop() {
    if(pressed) {
        file = SPIFFS.open(filePath, "r");
        if (!file) {
            Serial.println("\nError opening audio file"); 
        }
        file.seek(44, SeekSet);
   }
}

Please note that you want use WiFi and A2DP together!

[subbamaggus]

thank you for your answer!
that looks a lot easier. i guess i need to get vscode running. arduino code completion is not great, and to look up every possible call is kind of time consuming ;-)

I gave it a short shot. and even turned off wifi after getting the file.
but i guess the sync of the playback and the button press are not as i expect it to be.

i will have to look into that later... i am headed out for vacation.

[subbamaggus]

Hi,

sorry for not beeing able to respond for a while.

the debouncing and handling works a little better, but still not quite as i expect it to be.
i still have to take care of the overflow, but thats for later.

the first trigger works fine, but afterwards it is more or less sporadic.

#include <BluetoothA2DPSource.h>
#include <config.h>
#include <BluetoothA2DPOutput.h>
#include <BluetoothA2DP.h>

#include <WiFi.h>
#include <HTTPClient.h>
#include <SPIFFS.h>
#include "esp_task_wdt.h"

#include <Arduino.h>

const char* ssid = "MYSSID";
const char* password = "MYWIFIPW";
const char* fileURL  = "http://www.sasemdusem.de/response.wav"; //use your local server ip and the open port
const char* filePath = "/response.wav";
const char* btDeviceName = "MYBTDEVICE"; //use the name of your bt device


BluetoothA2DPSource a2dp_source;
File audioFile;
bool playbackDone = false;
int counter = 0;
int last_isr_counter = 0;

const uint8_t buttonPin = 18;
const uint8_t onBoardledPin = 2;
const uint8_t ledPin = 4;
const uint8_t BTStatusConnected = 2;

volatile bool pressed = false;

bool downloadFile(const char* url, const char* path) {
    Serial.println("downloading file");
    HTTPClient http;
    http.setTimeout(10000);
    http.begin(url);
    int httpCode = http.GET();
    if (httpCode == HTTP_CODE_OK) {
        WiFiClient* stream = http.getStreamPtr();
        File file = SPIFFS.open(path, FILE_WRITE);
        if (!file) {
            http.end();
            return false;
        }
        
        uint8_t buff[1024];
        int len = http.getSize(), total = 0;
        while (http.connected() && (len > 0 || len == -1)) {
            size_t avail = stream->available();
            if (avail) {
                int c = stream->readBytes(buff, min(avail, sizeof(buff)));
                file.write(buff, c);
                total += c;
                if (len > 0) len -= c;
                Serial.print(".");
            }
            delay(1);
        }
        Serial.printf("\nBytes received: %d\n", total);
        file.close();
        http.end();
        return true;
    } else {
        Serial.printf("HTTP error: %d\n", httpCode);
        http.end();
        return false;
    }
}

void ARDUINO_ISR_ATTR buttonISR() {
    if (counter - last_isr_counter > 2000000) {
        last_isr_counter = counter;
        pressed = true;
    }
}

int32_t get_sound_data(uint8_t *data, int32_t len) {
    
    if (!audioFile) {
        memset(data, len, 0);
        return len;
    }
    size_t bytesRead = audioFile.read(data, len);
    
    return bytesRead;
}

void setup() {
  
    pinMode(buttonPin, INPUT_PULLDOWN);
    pinMode(onBoardledPin, OUTPUT);
    pinMode(ledPin, OUTPUT);
    
    digitalWrite(ledPin, false);
    digitalWrite(onBoardledPin, false);
    
    Serial.begin(115200);
    delay(1000);
    esp_task_wdt_deinit();
    
    attachInterrupt(digitalPinToInterrupt(buttonPin), buttonISR, RISING);
    
    WiFi.begin(ssid, password);
    Serial.print("Connecting to WiFi");
    while (WiFi.status() != WL_CONNECTED) {
        delay(500); 
        Serial.print(".");
    }
    Serial.println(" Connected!");


    if (!SPIFFS.begin(true)) {
        Serial.println("SPIFFS mount failed, formatting...");
        if (!SPIFFS.format() || !SPIFFS.begin(true)) { 
            Serial.println("SPIFFS not available");
            return;
        }
    }

    if (downloadFile(fileURL, filePath)) {
        Serial.println("Download completed successfully");
    }
    else { 
        Serial.println("Download failed");
        return;
    }

    WiFi.mode(WIFI_OFF);
    
    Serial.println("Initializing Bluetooth...");
    a2dp_source.set_data_callback(get_sound_data);
    delay(2000);
    

    Serial.print("Connecting to Bluetooth");
    a2dp_source.start(btDeviceName);
    while(a2dp_source.get_connection_state() != BTStatusConnected) {
        delay(500); 
        Serial.print(".");
    }
    Serial.println(" Connected!");
    digitalWrite(onBoardledPin, true);
}

void loop() {
    counter++;

    if(pressed) {
        pressed = false;
        digitalWrite(ledPin, true);
        Serial.printf("button pressed at %d\n", counter);

        audioFile = SPIFFS.open(filePath, "r");
        if (!audioFile) {
            Serial.println("\nError opening audio file"); 
        }
        audioFile.seek(44, SeekSet);
        
        Serial.println("file loaded");
        digitalWrite(ledPin, false);
    }

}`

[subbamaggus]

i stripped down my code a little.

i removed the ISR for the button.

#include <BluetoothA2DPCommon.h>
#include <BluetoothA2DPSource.h>
#include <config.h>
#include <BluetoothA2DPOutput.h>
#include <BluetoothA2DP.h>

#include <WiFi.h>
#include <HTTPClient.h>
#include <SPIFFS.h>
#include "esp_task_wdt.h"

#include <Arduino.h>

const char* ssid = "MYSSID";
const char* password = "MYWIFIPW";
const char* fileURL  = "http://www.sasemdusem.de/response.wav"; //use your local server ip and the open port
const char* filePath = "/response.wav";
const char* btDeviceName = "MYBTDEVICE"; //use the name of your bt device


BluetoothA2DPSource a2dp_source;
File audioFile;
bool playbackDone = false;
int counter = 0;
int last_isr_counter = 0;

const uint8_t buttonPin = 18;
const uint8_t onBoardledPin = 2;
const uint8_t ledPin = 4;
const uint8_t BTStatusConnected = 2;

volatile bool pressed = false;

bool downloadFile(const char* url, const char* path) {
    Serial.println("downloading file");
    HTTPClient http;
    http.setTimeout(10000);
    http.begin(url);
    int httpCode = http.GET();
    if (httpCode == HTTP_CODE_OK) {
        WiFiClient* stream = http.getStreamPtr();
        File file = SPIFFS.open(path, FILE_WRITE);
        if (!file) {
            http.end();
            return false;
        }
        
        uint8_t buff[1024];
        int len = http.getSize(), total = 0;
        while (http.connected() && (len > 0 || len == -1)) {
            size_t avail = stream->available();
            if (avail) {
                int c = stream->readBytes(buff, min(avail, sizeof(buff)));
                file.write(buff, c);
                total += c;
                if (len > 0) len -= c;
                Serial.print(".");
            }
            delay(1);
        }
        Serial.printf("\nBytes received: %d\n", total);
        file.close();
        http.end();
        return true;
    } else {
        Serial.printf("HTTP error: %d\n", httpCode);
        http.end();
        return false;
    }
}

int32_t get_sound_data(uint8_t *data, int32_t len) {
    
    if (!audioFile) {
        memset(data, len, 0);
        return len;
    }
    size_t bytesRead = audioFile.read(data, len);
    
    return bytesRead;
}

void setup() {
  
    pinMode(buttonPin, INPUT_PULLDOWN);
    pinMode(onBoardledPin, OUTPUT);
    pinMode(ledPin, OUTPUT);
    
    digitalWrite(ledPin, false);
    digitalWrite(onBoardledPin, false);
    
    Serial.begin(115200);
    delay(1000);
    esp_task_wdt_deinit();
      
    WiFi.begin(ssid, password);
    Serial.print("Connecting to WiFi");
    while (WiFi.status() != WL_CONNECTED) {
        delay(500); 
        Serial.print(".");
    }
    Serial.println(" Connected!");


    if (!SPIFFS.begin(true)) {
        Serial.println("SPIFFS mount failed, formatting...");
        if (!SPIFFS.format() || !SPIFFS.begin(true)) { 
            Serial.println("SPIFFS not available");
            return;
        }
    }

    if (downloadFile(fileURL, filePath)) {
        Serial.println("Download completed successfully");
    }
    else { 
        Serial.println("Download failed");
        return;
    }

    WiFi.mode(WIFI_OFF);
    
    Serial.println("Initializing Bluetooth...");
    a2dp_source.set_data_callback(get_sound_data);
    delay(2000);
    

    Serial.print("Connecting to Bluetooth");
    a2dp_source.start(btDeviceName);
    while(a2dp_source.get_connection_state() != BTStatusConnected) {
        delay(500); 
        Serial.print(".");
    }
    Serial.println(" Connected!");
    digitalWrite(onBoardledPin, true);
}

void loop() {
    counter++;
    delay(5000);
    
    audioFile = SPIFFS.open(filePath, "r");
    if (!audioFile) {
        Serial.println("\nError opening audio file"); 
    }
    audioFile.seek(44, SeekSet);
        
    Serial.println("file loaded");

}

The output looks like

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:4980
load:0x40078000,len:16612
load:0x40080400,len:3500
entry 0x400805b4
E (562) esp_core_⸮f⸮�}⸮⸮⸮͡⸮ Core dump data check failed:
Calculated checksum='72a3ee88'
Image checksum='ffffffff'
Connecting to WiFi... Connected!
downloading file
...............................................................
Bytes received: 64260
Download completed successfully
Initializing Bluetooth...
Connecting to Bluetooth............................... Connected!
file loaded
file loaded
file loaded
file loaded
file loaded
file loaded
file loaded
file loaded

but i hear the sound super random and not in the 5 second manor that i expected. sometimes twice without delay, sometimes it takes more than a minute. The "file loaded" appears every 5 seconds. so the timing for that is fine.

i guess i did not really understand the get_sound_data() method and how it works.
Do i need to do some clearing? reinit? Do i need to make sure the isr for that is not triggered while the file is loading?

My wifi should be turned off. At least it was the only way to turn it off.

[pschatzmann]

My guess would be that Files are not thread save, so this is most likely a race condition.
In addition, close the file before assigning a new file, otherwise you are leaking memory...

[subbamaggus]

hi, thank you for your answer.

i was trying to get closer. your thought seems reasonable.

void loop() {
    counter++;
    delay(5000);

    audioFile.seek(44, SeekSet);
        
    Serial.println("file loaded");

}

i moved the opening to the setup() and the behavior stayed the same.

afterwards i was experimenting with some output to see if sth happens. but no luck yet.

since i was not able to get vscode up and running i am still stuck with arduino ide.
with that i was never able to start debugging. but i guess, multithreading is not easy to debug anyways.

i will keep on working on it. and keep you posted.

[pschatzmann]

Dont forget to read the relevant chapter in the documentation...

[subbamaggus]

Hi, i looked into the timing here.
and i assume your are right. the task processing looks weired when i just put some logging in my sketch.

as soon as i am able to compile and test one of your examples, i might be able to look into the multithread issues.

[subbamaggus]

i managed to compile the sources.

#include "AudioTools.h"
#include "AudioTools/AudioLibs/Concurrency.h" 

needs to be on top of the project, otherwise it will not find the headers. that totally confused me.

now that i can play around with the multicore processing. i will see how far i get.

[subbamaggus]

i tried to move the relevant stuff to a separate task.

but i guess i dont get the concept of the multithreading/multicore here.
or at least how the lib deals with it.

void method();
Task task("write", 3000, 10, 1);

void method() {
    counter++;
    pressed = false;

    Serial.println("start loop");
    
    counter_helper = 0;
    while(counter_helper < 20) {
        Serial.print("S");
        counter_helper ++;
        delay(100);
    }
    digitalWrite(ledPin, true);
    
    Serial.println("audioFile.seek");
    
    audioFile.seek(44, SeekSet);

    Serial.println("FIRE");
    pressed = true;

    digitalWrite(ledPin, false);
    
    counter_helper = 0;
    while(counter_helper < 20) {
        Serial.print("F");
        counter_helper ++;
        delay(100);
    }

    Serial.println("done loop");
}

int32_t get_sound_data(uint8_t *data, int32_t len) {
    //Serial.print("I");
    if(!pressed) {
        return 0;
    }
    
    if (!audioFile) {
        Serial.print("*");
        memset(data, len, 0);
        return len;
    }
    size_t bytesRead = audioFile.read(data, len);
    if(bytesRead > 0 and bytesRead < 512) {
        Serial.printf(" %d", bytesRead);
    }
    return bytesRead;
}

my serial output looks like:

start loop
SSSSSSSSSSSSSSSSSSSSaudioFile.seek
FIRE
F 16FF 200FFFFFFFFFFFFFFFFFdone loop
start loop
SSSSSSSSSSmain loop
SSSSSSSSSSaudioFile.seek
FIRE
F 312FFF 416FFFFFFFFFFFFFFFFdone loop
start loop
SSSSSSSSSSSSSSSSSSSSmain loop
audioFile.seek
FIRE
F 96F 120FFFFFFFFFFFFFFFFFFdone loop
start loop
SSSSSSSSSSSSSSSSSSSSaudioFile.seek
FIRE
F 392F 336FFFFFFFFmain loop
FFFFFFFFFFdone loop
start loop
SSSSSSSSSSSSSSSSSSSSaudioFile.seek
FIRE
F 176FF 40FFFFFFFFFFFFFFFFFmain loop
done loop
start loop
SSSSSSSSSSSSSSSSSSSSaudioFile.seek
FIRE
F 472F 256FFFFFFFFFFFFFFFFFFdone loop
start loop
SSSSSSSSSSmain loop
SSSSSSSSSSaudioFile.seek
FIRE
F 256F 472FFFFFFFFFFFFFFFFFFdone loop
start loop
SSSSSSSSSSSSSSSSSSSSmain loop
audioFile.seek
FIRE
F 40FF 176FFFFFFFFFFFFFFFFFdone loop

the LED lights up everytime the word FIRE is outputed, but the sound is still just random.

[pschatzmann]

The Arduino loop is already in a task whch is separate from the Bluetooth data provider!
The whole point is that files are not thread save, so you should use some thread save data structures.

All you need to do is to write and read from/to the same (thread save) queue:

• in get_sound_data() just provide the data from the queue, or if it is empty do the memset to 0
• in the loop you just copy the data to the queue.
• you might need to add some small delays to hand off the tasks
• Do not use delay() to pause the output, but write the proper amout of empty data! (At 44100, 2 channels 16 bits: 1 second = 176,400 bytes)

This way the sketch should get pretty small!

Do not use any Serial print: this will mess up the audio output because it is much too slow!

[subbamaggus]

hm. i wonder:
my data is pretty small. i was dealing with 64260, now i am trying to reduce the data to get it in a buffer that does not need to be read everytime (SPIFF) ...

i will try a bigger file... maybe the buffer is just too empty!?

[subbamaggus]

the serial prints are only in there for debugging purpose.
since i dont have any clue what and when is happening what.

another aproach could be:
load the file on startup and store it in a buffer.

just set the pointer in that buffer to beginning everytime the sound needs to play (it is basically always the same)

but my sketch would not work as soon as i do that. the bluetooth never connects if i have the buffer declard.

i guess your suggestions dont fit in pattern i have in mind. so i dont really know what to do with them.

i will keep playing around with what i think you mean.

[pschatzmann]

If you want to store the whole "file", put your audio data in PROGMEM or PSRAM since the RAM is limited.
But be careful: changing a pointer in the loop() while the A2DP callback reads it in another task is a race condition!

I guess the simplest would be to use the A2DPStream from the AudioTools: in the loop just write the file data to it...
(This internally already implements the thread save queue described above.).

Finally note that A2DP has quite some lag. So there is quite some delay between an action on the ESP and the time you hear it on the speaker.

[subbamaggus]

i guess then i dont understand what i am doing at that point.

i thought the A2DPStream was kind of what i am trying to do.

how big can the lag be? are we talking milliseconds? seconds?

[pschatzmann]

If I remember right (in the best case) a couple of seconds...

BluetoothA2DPSource is basic functionality which is part of the A2DP library.
A2DPStream is part of the Audio Tools project and provides a Arduino Stream API on top of the above.

[subbamaggus]

if that is the case, this is too slow to what i am trying to accomplish.

[subbamaggus]

so you are talking about set_data_source vs set_data_callback?

[pschatzmann]

Here is an example using the A2DPStream

[subbamaggus]

thats the one i was looking at.

it does not compile for me.

this ide is still a mistery for me... how it deals with paths...

[pschatzmann]

Mybe you forgot to install the arduino-audio-tools library:

It's working perfectly for me:

FQBN: esp32:esp32:esp32
Using board 'esp32' from platform in folder: /home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8
Using core 'esp32' from platform in folder: /home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8

/usr/bin/env bash -c "[ ! -f \"/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a\"/partitions.csv ] || cp -f \"/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a\"/partitions.csv \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/partitions.csv"
/usr/bin/env bash -c "[ -f \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/partitions.csv ] || [ ! -f \"/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32\"/partitions.csv ] || cp \"/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32\"/partitions.csv \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/partitions.csv"
/usr/bin/env bash -c "[ -f \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/partitions.csv ] || cp \"/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8\"/tools/partitions/default.csv \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/partitions.csv"
/usr/bin/env bash -c "[ -f \"/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a\"/bootloader.bin ] && cp -f \"/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a\"/bootloader.bin \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/sketch_apr20a.ino.bootloader.bin || ( [ -f \"/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32\"/bootloader.bin ] && cp \"/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32\"/bootloader.bin \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/sketch_apr20a.ino.bootloader.bin || \"/home/pschatzmann/.arduino15/packages/esp32/tools/esptool_py/5.2.0\"/esptool --chip esp32 elf2image --flash-mode dio --flash-freq 80m --flash-size 4MB -o \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/sketch_apr20a.ino.bootloader.bin \"/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8\"/bin/bootloader_qio_80m.elf )"
esptool v5.2.0
Creating ESP32 image...
Merged 2 ELF sections.
Successfully created ESP32 image.
/usr/bin/env bash -c "[ ! -f \"/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a\"/build_opt.h ] || cp -f \"/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a\"/build_opt.h \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/build_opt.h"
/usr/bin/env bash -c "[ -f \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/build_opt.h ] || : > \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/build_opt.h"
/usr/bin/env bash -c ": > '/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts'"
/usr/bin/env bash -c "cp -f \"/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8\"/sdkconfig \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/sdkconfig"
Detecting libraries used...
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_default -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch/sketch_apr20a.ino.cpp -o /dev/null
Alternatives for AudioTools.h: [audio-tools@1.2.2]
ResolveLibrary(AudioTools.h)
  -> candidates: [audio-tools@1.2.2]
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_default -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch/sketch_apr20a.ino.cpp -o /dev/null
Alternatives for BluetoothA2DPSink.h: [ESP32-A2DP@1.8.10]
ResolveLibrary(BluetoothA2DPSink.h)
  -> candidates: [ESP32-A2DP@1.8.10]
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_default -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch/sketch_apr20a.ino.cpp -o /dev/null
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_default -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src/AudioTools/CoreAudio/AudioRuntime.cpp -o /dev/null
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_default -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src/BluetoothA2DPCommon.cpp -o /dev/null
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_default -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src/BluetoothA2DPOutput.cpp -o /dev/null
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_default -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src/BluetoothA2DPSink.cpp -o /dev/null
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_default -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src/BluetoothA2DPSinkQueued.cpp -o /dev/null
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_default -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src/BluetoothA2DPSource.cpp -o /dev/null
Generating function prototypes...
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_default -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch/sketch_apr20a.ino.cpp -o /tmp/2724411731/sketch_merged.cpp
/home/pschatzmann/.arduino15/packages/builtin/tools/ctags/5.8-arduino11/ctags -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives /tmp/2724411731/sketch_merged.cpp

Compiling sketch...
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -MMD -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -Os -Werror=return-type -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 "-DARDUINO_BOARD=\"ESP32_DEV\"" "-DARDUINO_VARIANT=\"esp32\"" -DARDUINO_PARTITION_default "-DARDUINO_HOST_OS=\"linux\"" "-DARDUINO_FQBN=\"esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default\"" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch/sketch_apr20a.ino.cpp -o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch/sketch_apr20a.ino.cpp.o
Compiling libraries...
Compiling library "audio-tools"
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -MMD -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -Os -Werror=return-type -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 "-DARDUINO_BOARD=\"ESP32_DEV\"" "-DARDUINO_VARIANT=\"esp32\"" -DARDUINO_PARTITION_default "-DARDUINO_HOST_OS=\"linux\"" "-DARDUINO_FQBN=\"esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default\"" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src/AudioTools/CoreAudio/AudioRuntime.cpp -o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/libraries/arduino-audio-tools/AudioTools/CoreAudio/AudioRuntime.cpp.o
Compiling library "ESP32-A2DP"
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -MMD -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -Os -Werror=return-type -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 "-DARDUINO_BOARD=\"ESP32_DEV\"" "-DARDUINO_VARIANT=\"esp32\"" -DARDUINO_PARTITION_default "-DARDUINO_HOST_OS=\"linux\"" "-DARDUINO_FQBN=\"esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default\"" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src/BluetoothA2DPSink.cpp -o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/libraries/ESP32-A2DP/BluetoothA2DPSink.cpp.o
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -MMD -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -Os -Werror=return-type -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 "-DARDUINO_BOARD=\"ESP32_DEV\"" "-DARDUINO_VARIANT=\"esp32\"" -DARDUINO_PARTITION_default "-DARDUINO_HOST_OS=\"linux\"" "-DARDUINO_FQBN=\"esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default\"" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src/BluetoothA2DPCommon.cpp -o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/libraries/ESP32-A2DP/BluetoothA2DPCommon.cpp.o
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -MMD -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -Os -Werror=return-type -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 "-DARDUINO_BOARD=\"ESP32_DEV\"" "-DARDUINO_VARIANT=\"esp32\"" -DARDUINO_PARTITION_default "-DARDUINO_HOST_OS=\"linux\"" "-DARDUINO_FQBN=\"esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default\"" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src/BluetoothA2DPSinkQueued.cpp -o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/libraries/ESP32-A2DP/BluetoothA2DPSinkQueued.cpp.o
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -MMD -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -Os -Werror=return-type -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 "-DARDUINO_BOARD=\"ESP32_DEV\"" "-DARDUINO_VARIANT=\"esp32\"" -DARDUINO_PARTITION_default "-DARDUINO_HOST_OS=\"linux\"" "-DARDUINO_FQBN=\"esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default\"" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src/BluetoothA2DPOutput.cpp -o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/libraries/ESP32-A2DP/BluetoothA2DPOutput.cpp.o
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -MMD -c @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/cpp_flags -Os -Werror=return-type -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 "-DARDUINO_BOARD=\"ESP32_DEV\"" "-DARDUINO_VARIANT=\"esp32\"" -DARDUINO_PARTITION_default "-DARDUINO_HOST_OS=\"linux\"" "-DARDUINO_FQBN=\"esp32:esp32:esp32:UploadSpeed=921600,CPUFreq=240,FlashFreq=80,FlashMode=qio,FlashSize=4M,PartitionScheme=default,DebugLevel=none,PSRAM=disabled,LoopCore=1,EventsCore=1,EraseFlash=none,JTAGAdapter=default,ZigbeeMode=default\"" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1 -DARDUINO_USB_CDC_ON_BOOT=0 @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/defines -I/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a -iprefix /home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/include/ @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/includes -I/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi/include -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/cores/esp32 -I/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/variants/esp32 -I/home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools/src -I/home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/build_opt.h @/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts /home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP/src/BluetoothA2DPSource.cpp -o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/libraries/ESP32-A2DP/BluetoothA2DPSource.cpp.o
Compiling core...
/usr/bin/env bash -c "echo -DARDUINO_CORE_BUILD > '/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts'"
Using precompiled core: /home/pschatzmann/.cache/arduino/cores/9fe229017a8affff2de45fe643d63228/core.a
/usr/bin/env bash -c ": > '/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/file_opts'"
Linking everything together...
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-g++ -Wl,--Map=/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch_apr20a.ino.map -L/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/lib -L/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/ld -L/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/qio_qspi -Wl,--wrap=esp_panic_handler @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/ld_flags @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/ld_scripts -Wl,--start-group /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch/sketch_apr20a.ino.cpp.o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/libraries/arduino-audio-tools/AudioTools/CoreAudio/AudioRuntime.cpp.o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/libraries/ESP32-A2DP/BluetoothA2DPCommon.cpp.o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/libraries/ESP32-A2DP/BluetoothA2DPOutput.cpp.o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/libraries/ESP32-A2DP/BluetoothA2DPSink.cpp.o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/libraries/ESP32-A2DP/BluetoothA2DPSinkQueued.cpp.o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/libraries/ESP32-A2DP/BluetoothA2DPSource.cpp.o /home/pschatzmann/.cache/arduino/cores/9fe229017a8affff2de45fe643d63228/core.a @/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8/flags/ld_libs -Wl,--end-group -Wl,-EL -o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch_apr20a.ino.elf
/home/pschatzmann/.arduino15/packages/esp32/tools/esptool_py/5.2.0/esptool --chip esp32 elf2image --flash-mode dio --flash-freq 80m --flash-size 4MB --elf-sha256-offset 0xb0 -o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch_apr20a.ino.bin /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch_apr20a.ino.elf
esptool v5.2.0
Creating ESP32 image...
Merged 2 ELF sections.
Successfully created ESP32 image.
python3 /home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/tools/gen_esp32part.py -q /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/partitions.csv /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch_apr20a.ino.partitions.bin
/usr/bin/env bash -c "[ ! -d \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/libraries/Insights ] || python3 \"/home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8\"/tools/gen_insights_package.py /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405 sketch_apr20a.ino \"/tmp/.arduinoIDE-unsaved2026320-1663137-1e6o5w3.sg18/sketch_apr20a\""
/usr/bin/env bash -c "[ ! -d \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/libraries/ESP_SR ] || [ ! -f \"/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8\"/esp_sr/srmodels.bin ] || cp -f \"/home/pschatzmann/.arduino15/packages/esp32/tools/esp32-libs/3.3.8\"/esp_sr/srmodels.bin \"/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405\"/srmodels.bin"
/home/pschatzmann/.arduino15/packages/esp32/tools/esptool_py/5.2.0/esptool --chip esp32 merge-bin -o /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch_apr20a.ino.merged.bin --pad-to-size 4MB --flash-mode keep --flash-freq keep --flash-size keep 0x1000 /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch_apr20a.ino.bootloader.bin 0x8000 /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch_apr20a.ino.partitions.bin 0xe000 /home/pschatzmann/.arduino15/packages/esp32/hardware/esp32/3.3.8/tools/partitions/boot_app0.bin 0x10000 /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch_apr20a.ino.bin
esptool v5.2.0
Wrote 0x400000 bytes to file '/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch_apr20a.ino.merged.bin', ready to flash to offset 0x0.
/usr/bin/env bash -c "echo '--flash-mode dio --flash-freq 80m --flash-size 4MB'>'/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/flash_args'&& echo '0x1000 sketch_apr20a.ino.bootloader.bin'>> '/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/flash_args'&& echo '0x8000 sketch_apr20a.ino.partitions.bin'>> '/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/flash_args'&& echo '0xe000 boot_app0.bin'>> '/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/flash_args'&& echo '0x10000 sketch_apr20a.ino.bin'>> '/home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/flash_args'"
Using library audio-tools at version 1.2.2 in folder: /home/pschatzmann/Development/Arduino/libraries/arduino-audio-tools 
Using library ESP32-A2DP at version 1.8.10 in folder: /home/pschatzmann/Development/Arduino/libraries/ESP32-A2DP 
/home/pschatzmann/.arduino15/packages/esp32/tools/esp-x32/2601/bin/xtensa-esp32-elf-size -A /home/pschatzmann/.cache/arduino/sketches/5F1E5CF1593A7C4BCF8BA61E83F65405/sketch_apr20a.ino.elf
Sketch uses 1126823 bytes (85%) of program storage space. Maximum is 1310720 bytes.
Global variables use 41740 bytes (12%) of dynamic memory, leaving 285940 bytes for local variables. Maximum is 327680 bytes.

[subbamaggus]

i dont think it is an issue with the example.
i am sure it is a problem with my setup. i just dont know where to look to debug what i am missing.

the one ino compiles (thats why i tried to go small steps) with all the others i was not able to compile. and if it does not compile, i am way to far off to ask any questions.

i guess i need to step a way out and try to get my envirionment under control.

sorry to bother you with my lack of experience! i should be better at that point.

just for completeness...

arduino-builder -dump-prefs -logger=machine -hardware /usr/share/arduino/hardware -hardware /home/maggus/.arduino15/packages -tools /usr/share/arduino/hardware/tools/avr -tools /home/maggus/.arduino15/packages -libraries /home/maggus/Arduino/libraries -fqbn=esp32:esp32:esp32:JTAGAdapter=default,PSRAM=disabled,PartitionScheme=no_ota,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,LoopCore=1,EventsCore=1,DebugLevel=none,EraseFlash=none,ZigbeeMode=default -vid-pid=1A86_7523 -ide-version=10819 -build-path /tmp/arduino_build_109290 -warnings=none -build-cache /tmp/arduino_cache_992389 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.openocd-esp32.path=/home/maggus/.arduino15/packages/esp32/tools/openocd-esp32/v0.12.0-esp32-20251215 -prefs=runtime.tools.openocd-esp32-v0.12.0-esp32-20251215.path=/home/maggus/.arduino15/packages/esp32/tools/openocd-esp32/v0.12.0-esp32-20251215 -prefs=runtime.tools.xtensa-esp-elf-gdb.path=/home/maggus/.arduino15/packages/esp32/tools/xtensa-esp-elf-gdb/16.3_20250913 -prefs=runtime.tools.xtensa-esp-elf-gdb-16.3_20250913.path=/home/maggus/.arduino15/packages/esp32/tools/xtensa-esp-elf-gdb/16.3_20250913 -prefs=runtime.tools.esp32h2-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32h2-libs/3.3.6 -prefs=runtime.tools.esp32h2-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32h2-libs/3.3.6 -prefs=runtime.tools.esp-rv32.path=/home/maggus/.arduino15/packages/esp32/tools/esp-rv32/2511 -prefs=runtime.tools.esp-rv32-2511.path=/home/maggus/.arduino15/packages/esp32/tools/esp-rv32/2511 -prefs=runtime.tools.esptool_py.path=/home/maggus/.arduino15/packages/esp32/tools/esptool_py/5.1.0 -prefs=runtime.tools.esptool_py-5.1.0.path=/home/maggus/.arduino15/packages/esp32/tools/esptool_py/5.1.0 -prefs=runtime.tools.esp-x32.path=/home/maggus/.arduino15/packages/esp32/tools/esp-x32/2511 -prefs=runtime.tools.esp-x32-2511.path=/home/maggus/.arduino15/packages/esp32/tools/esp-x32/2511 -prefs=runtime.tools.dfu-util.path=/home/maggus/.arduino15/packages/arduino/tools/dfu-util/0.11.0-arduino5 -prefs=runtime.tools.dfu-util-0.11.0-arduino5.path=/home/maggus/.arduino15/packages/arduino/tools/dfu-util/0.11.0-arduino5 -prefs=runtime.tools.esp32p4_es-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32p4_es-libs/3.3.6 -prefs=runtime.tools.esp32p4_es-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32p4_es-libs/3.3.6 -prefs=runtime.tools.esp32c5-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32c5-libs/3.3.6 -prefs=runtime.tools.esp32c5-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32c5-libs/3.3.6 -prefs=runtime.tools.esp32-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6 -prefs=runtime.tools.esp32-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6 -prefs=runtime.tools.esp32p4-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32p4-libs/3.3.6 -prefs=runtime.tools.esp32p4-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32p4-libs/3.3.6 -prefs=runtime.tools.esp32s2-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32s2-libs/3.3.6 -prefs=runtime.tools.esp32s2-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32s2-libs/3.3.6 -prefs=runtime.tools.riscv32-esp-elf-gdb.path=/home/maggus/.arduino15/packages/esp32/tools/riscv32-esp-elf-gdb/16.3_20250913 -prefs=runtime.tools.riscv32-esp-elf-gdb-16.3_20250913.path=/home/maggus/.arduino15/packages/esp32/tools/riscv32-esp-elf-gdb/16.3_20250913 -prefs=runtime.tools.esp32c3-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32c3-libs/3.3.6 -prefs=runtime.tools.esp32c3-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32c3-libs/3.3.6 -prefs=runtime.tools.esp32s3-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32s3-libs/3.3.6 -prefs=runtime.tools.esp32s3-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32s3-libs/3.3.6 -prefs=runtime.tools.esp32c6-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32c6-libs/3.3.6 -prefs=runtime.tools.esp32c6-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32c6-libs/3.3.6 -prefs=runtime.tools.mkspiffs.path=/home/maggus/.arduino15/packages/esp32/tools/mkspiffs/0.2.3 -prefs=runtime.tools.mkspiffs-0.2.3.path=/home/maggus/.arduino15/packages/esp32/tools/mkspiffs/0.2.3 -prefs=runtime.tools.mklittlefs.path=/home/maggus/.arduino15/packages/esp32/tools/mklittlefs/4.0.2-db0513a -prefs=runtime.tools.mklittlefs-4.0.2-db0513a.path=/home/maggus/.arduino15/packages/esp32/tools/mklittlefs/4.0.2-db0513a -verbose /home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp/streams-i2s-a2dp.ino
arduino-builder -compile -logger=machine -hardware /usr/share/arduino/hardware -hardware /home/maggus/.arduino15/packages -tools /usr/share/arduino/hardware/tools/avr -tools /home/maggus/.arduino15/packages -libraries /home/maggus/Arduino/libraries -fqbn=esp32:esp32:esp32:JTAGAdapter=default,PSRAM=disabled,PartitionScheme=no_ota,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,LoopCore=1,EventsCore=1,DebugLevel=none,EraseFlash=none,ZigbeeMode=default -vid-pid=1A86_7523 -ide-version=10819 -build-path /tmp/arduino_build_109290 -warnings=none -build-cache /tmp/arduino_cache_992389 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.openocd-esp32.path=/home/maggus/.arduino15/packages/esp32/tools/openocd-esp32/v0.12.0-esp32-20251215 -prefs=runtime.tools.openocd-esp32-v0.12.0-esp32-20251215.path=/home/maggus/.arduino15/packages/esp32/tools/openocd-esp32/v0.12.0-esp32-20251215 -prefs=runtime.tools.xtensa-esp-elf-gdb.path=/home/maggus/.arduino15/packages/esp32/tools/xtensa-esp-elf-gdb/16.3_20250913 -prefs=runtime.tools.xtensa-esp-elf-gdb-16.3_20250913.path=/home/maggus/.arduino15/packages/esp32/tools/xtensa-esp-elf-gdb/16.3_20250913 -prefs=runtime.tools.esp32h2-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32h2-libs/3.3.6 -prefs=runtime.tools.esp32h2-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32h2-libs/3.3.6 -prefs=runtime.tools.esp-rv32.path=/home/maggus/.arduino15/packages/esp32/tools/esp-rv32/2511 -prefs=runtime.tools.esp-rv32-2511.path=/home/maggus/.arduino15/packages/esp32/tools/esp-rv32/2511 -prefs=runtime.tools.esptool_py.path=/home/maggus/.arduino15/packages/esp32/tools/esptool_py/5.1.0 -prefs=runtime.tools.esptool_py-5.1.0.path=/home/maggus/.arduino15/packages/esp32/tools/esptool_py/5.1.0 -prefs=runtime.tools.esp-x32.path=/home/maggus/.arduino15/packages/esp32/tools/esp-x32/2511 -prefs=runtime.tools.esp-x32-2511.path=/home/maggus/.arduino15/packages/esp32/tools/esp-x32/2511 -prefs=runtime.tools.dfu-util.path=/home/maggus/.arduino15/packages/arduino/tools/dfu-util/0.11.0-arduino5 -prefs=runtime.tools.dfu-util-0.11.0-arduino5.path=/home/maggus/.arduino15/packages/arduino/tools/dfu-util/0.11.0-arduino5 -prefs=runtime.tools.esp32p4_es-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32p4_es-libs/3.3.6 -prefs=runtime.tools.esp32p4_es-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32p4_es-libs/3.3.6 -prefs=runtime.tools.esp32c5-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32c5-libs/3.3.6 -prefs=runtime.tools.esp32c5-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32c5-libs/3.3.6 -prefs=runtime.tools.esp32-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6 -prefs=runtime.tools.esp32-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6 -prefs=runtime.tools.esp32p4-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32p4-libs/3.3.6 -prefs=runtime.tools.esp32p4-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32p4-libs/3.3.6 -prefs=runtime.tools.esp32s2-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32s2-libs/3.3.6 -prefs=runtime.tools.esp32s2-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32s2-libs/3.3.6 -prefs=runtime.tools.riscv32-esp-elf-gdb.path=/home/maggus/.arduino15/packages/esp32/tools/riscv32-esp-elf-gdb/16.3_20250913 -prefs=runtime.tools.riscv32-esp-elf-gdb-16.3_20250913.path=/home/maggus/.arduino15/packages/esp32/tools/riscv32-esp-elf-gdb/16.3_20250913 -prefs=runtime.tools.esp32c3-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32c3-libs/3.3.6 -prefs=runtime.tools.esp32c3-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32c3-libs/3.3.6 -prefs=runtime.tools.esp32s3-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32s3-libs/3.3.6 -prefs=runtime.tools.esp32s3-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32s3-libs/3.3.6 -prefs=runtime.tools.esp32c6-libs.path=/home/maggus/.arduino15/packages/esp32/tools/esp32c6-libs/3.3.6 -prefs=runtime.tools.esp32c6-libs-3.3.6.path=/home/maggus/.arduino15/packages/esp32/tools/esp32c6-libs/3.3.6 -prefs=runtime.tools.mkspiffs.path=/home/maggus/.arduino15/packages/esp32/tools/mkspiffs/0.2.3 -prefs=runtime.tools.mkspiffs-0.2.3.path=/home/maggus/.arduino15/packages/esp32/tools/mkspiffs/0.2.3 -prefs=runtime.tools.mklittlefs.path=/home/maggus/.arduino15/packages/esp32/tools/mklittlefs/4.0.2-db0513a -prefs=runtime.tools.mklittlefs-4.0.2-db0513a.path=/home/maggus/.arduino15/packages/esp32/tools/mklittlefs/4.0.2-db0513a -verbose /home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp/streams-i2s-a2dp.ino
Using board 'esp32' from platform in folder: /home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6
Using core 'esp32' from platform in folder: /home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6
WARNUNG: Kategorie 'Sound' in der Bibliothek ESP_SR ist ungültig und wird auf 'Uncategorized' festgelegt
WARNUNG: Kategorie 'Security' in der Bibliothek Hash ist ungültig und wird auf 'Uncategorized' festgelegt
WARNUNG: Kategorie '' in der Bibliothek ESP Insights ist ungültig und wird auf 'Uncategorized' festgelegt
WARNUNG: Kategorie '' in der Bibliothek ESP RainMaker ist ungültig und wird auf 'Uncategorized' festgelegt
WARNUNG: Kategorie '' in der Bibliothek TFLite Micro ist ungültig und wird auf 'Uncategorized' festgelegt
WARNUNG: Kategorie '' in der Bibliothek WiFiProv ist ungültig und wird auf 'Uncategorized' festgelegt
/usr/bin/env bash -c "[ ! -f "/home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp"/partitions.csv ] || cp -f "/home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp"/partitions.csv "/tmp/arduino_build_109290"/partitions.csv"
/usr/bin/env bash -c "[ -f "/tmp/arduino_build_109290"/partitions.csv ] || [ ! -f "/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/variants/esp32"/partitions.csv ] || cp "/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/variants/esp32"/partitions.csv "/tmp/arduino_build_109290"/partitions.csv"
/usr/bin/env bash -c "[ -f "/tmp/arduino_build_109290"/partitions.csv ] || cp "/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6"/tools/partitions/no_ota.csv "/tmp/arduino_build_109290"/partitions.csv"
/usr/bin/env bash -c "[ -f "/home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp"/bootloader.bin ] && cp -f "/home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp"/bootloader.bin "/tmp/arduino_build_109290"/streams-i2s-a2dp.ino.bootloader.bin || ( [ -f "/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/variants/esp32"/bootloader.bin ] && cp "/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/variants/esp32"/bootloader.bin "/tmp/arduino_build_109290"/streams-i2s-a2dp.ino.bootloader.bin || "/home/maggus/.arduino15/packages/esp32/tools/esptool_py/5.1.0"/esptool --chip esp32 elf2image --flash-mode dio --flash-freq 80m --flash-size 4MB -o "/tmp/arduino_build_109290"/streams-i2s-a2dp.ino.bootloader.bin "/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6"/bin/bootloader_qio_80m.elf )"
esptool v5.1.0
Creating ESP32 image...
Merged 2 ELF sections.
Successfully created ESP32 image.
/usr/bin/env bash -c "[ ! -f "/home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp"/build_opt.h ] || cp -f "/home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp"/build_opt.h "/tmp/arduino_build_109290"/build_opt.h"
/usr/bin/env bash -c "[ -f "/tmp/arduino_build_109290"/build_opt.h ] || : > "/tmp/arduino_build_109290"/build_opt.h"
/usr/bin/env bash -c ": > '/tmp/arduino_build_109290/file_opts'"
/usr/bin/env bash -c "cp -f "/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6"/sdkconfig "/tmp/arduino_build_109290"/sdkconfig"
Detecting libraries used...
"/home/maggus/.arduino15/packages/esp32/tools/esp-x32/2511/bin/xtensa-esp32-elf-g++"   -c "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/cpp_flags" -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10819 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_no_ota -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:JTAGAdapter=default,PSRAM=disabled,PartitionScheme=no_ota,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,LoopCore=1,EventsCore=1,DebugLevel=none,EraseFlash=none,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1  -DARDUINO_USB_CDC_ON_BOOT=0  "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/defines" "-I/home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp" -iprefix "/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/include/" "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/includes" "-I/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/qio_qspi/include" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/cores/esp32" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/variants/esp32" "@/tmp/arduino_build_109290/build_opt.h" "@/tmp/arduino_build_109290/file_opts" "/tmp/arduino_build_109290/sketch/streams-i2s-a2dp.ino.cpp" -o "/dev/null"
"/home/maggus/.arduino15/packages/esp32/tools/esp-x32/2511/bin/xtensa-esp32-elf-g++"   -c "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/cpp_flags" -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10819 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_no_ota -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:JTAGAdapter=default,PSRAM=disabled,PartitionScheme=no_ota,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,LoopCore=1,EventsCore=1,DebugLevel=none,EraseFlash=none,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1  -DARDUINO_USB_CDC_ON_BOOT=0  "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/defines" "-I/home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp" -iprefix "/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/include/" "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/includes" "-I/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/qio_qspi/include" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/cores/esp32" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/variants/esp32" "-I/home/maggus/Arduino/libraries/arduino-audio-tools/src" "@/tmp/arduino_build_109290/build_opt.h" "@/tmp/arduino_build_109290/file_opts" "/tmp/arduino_build_109290/sketch/streams-i2s-a2dp.ino.cpp" -o "/dev/null"
"/home/maggus/.arduino15/packages/esp32/tools/esp-x32/2511/bin/xtensa-esp32-elf-g++"   -c "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/cpp_flags" -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10819 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_no_ota -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:JTAGAdapter=default,PSRAM=disabled,PartitionScheme=no_ota,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,LoopCore=1,EventsCore=1,DebugLevel=none,EraseFlash=none,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1  -DARDUINO_USB_CDC_ON_BOOT=0  "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/defines" "-I/home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp" -iprefix "/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/include/" "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/includes" "-I/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/qio_qspi/include" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/cores/esp32" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/variants/esp32" "-I/home/maggus/Arduino/libraries/arduino-audio-tools/src" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/libraries/WiFi/src" "@/tmp/arduino_build_109290/build_opt.h" "@/tmp/arduino_build_109290/file_opts" "/tmp/arduino_build_109290/sketch/streams-i2s-a2dp.ino.cpp" -o "/dev/null"
"/home/maggus/.arduino15/packages/esp32/tools/esp-x32/2511/bin/xtensa-esp32-elf-g++"   -c "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/cpp_flags" -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10819 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_no_ota -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:JTAGAdapter=default,PSRAM=disabled,PartitionScheme=no_ota,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,LoopCore=1,EventsCore=1,DebugLevel=none,EraseFlash=none,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1  -DARDUINO_USB_CDC_ON_BOOT=0  "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/defines" "-I/home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp" -iprefix "/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/include/" "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/includes" "-I/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/qio_qspi/include" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/cores/esp32" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/variants/esp32" "-I/home/maggus/Arduino/libraries/arduino-audio-tools/src" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/libraries/WiFi/src" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/libraries/Network/src" "@/tmp/arduino_build_109290/build_opt.h" "@/tmp/arduino_build_109290/file_opts" "/tmp/arduino_build_109290/sketch/streams-i2s-a2dp.ino.cpp" -o "/dev/null"
"/home/maggus/.arduino15/packages/esp32/tools/esp-x32/2511/bin/xtensa-esp32-elf-g++"   -c "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/cpp_flags" -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10819 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_no_ota -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:JTAGAdapter=default,PSRAM=disabled,PartitionScheme=no_ota,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,LoopCore=1,EventsCore=1,DebugLevel=none,EraseFlash=none,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1  -DARDUINO_USB_CDC_ON_BOOT=0  "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/defines" "-I/home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp" -iprefix "/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/include/" "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/includes" "-I/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/qio_qspi/include" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/cores/esp32" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/variants/esp32" "-I/home/maggus/Arduino/libraries/arduino-audio-tools/src" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/libraries/WiFi/src" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/libraries/Network/src" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/libraries/NetworkClientSecure/src" "@/tmp/arduino_build_109290/build_opt.h" "@/tmp/arduino_build_109290/file_opts" "/tmp/arduino_build_109290/sketch/streams-i2s-a2dp.ino.cpp" -o "/dev/null"
"/home/maggus/.arduino15/packages/esp32/tools/esp-x32/2511/bin/xtensa-esp32-elf-g++"   -c "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/cpp_flags" -w -Os -Werror=return-type -w -x c++ -E -CC -DF_CPU=240000000L -DARDUINO=10819 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 -DARDUINO_BOARD="ESP32_DEV" -DARDUINO_VARIANT="esp32" -DARDUINO_PARTITION_no_ota -DARDUINO_HOST_OS="linux" -DARDUINO_FQBN="esp32:esp32:esp32:JTAGAdapter=default,PSRAM=disabled,PartitionScheme=no_ota,CPUFreq=240,FlashMode=qio,FlashFreq=80,FlashSize=4M,UploadSpeed=921600,LoopCore=1,EventsCore=1,DebugLevel=none,EraseFlash=none,ZigbeeMode=default" -DESP32=ESP32 -DCORE_DEBUG_LEVEL=0 -DARDUINO_RUNNING_CORE=1 -DARDUINO_EVENT_RUNNING_CORE=1  -DARDUINO_USB_CDC_ON_BOOT=0  "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/defines" "-I/home/maggus/Projects/arduino-audio-tools/examples/examples-communication/a2dp/streams-i2s-a2dp" -iprefix "/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/include/" "@/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/flags/includes" "-I/home/maggus/.arduino15/packages/esp32/tools/esp32-libs/3.3.6/qio_qspi/include" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/cores/esp32" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/variants/esp32" "-I/home/maggus/Arduino/libraries/arduino-audio-tools/src" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/libraries/WiFi/src" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/libraries/Network/src" "-I/home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/libraries/NetworkClientSecure/src" "@/tmp/arduino_build_109290/build_opt.h" "@/tmp/arduino_build_109290/file_opts" "/tmp/arduino_build_109290/sketch/streams-i2s-a2dp.ino.cpp" -o "/tmp/arduino_build_109290/preproc/ctags_target_for_gcc_minus_e.cpp"
streams-i2s-a2dp:11:10: fatal error: AudioTools/Communication/A2DPStream.h: No such file or directory
   11 | #include "AudioTools/Communication/A2DPStream.h"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Bibliothek arduino-audio-tools in Version 1.1.2 im Ordner: /home/maggus/Arduino/libraries/arduino-audio-tools  wird verwendet
Bibliothek WiFi in Version 3.3.6 im Ordner: /home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/libraries/WiFi  wird verwendet
Bibliothek Network in Version 3.3.6 im Ordner: /home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/libraries/Network  wird verwendet
Bibliothek NetworkClientSecure in Version 3.3.6 im Ordner: /home/maggus/.arduino15/packages/esp32/hardware/esp32/3.3.6/libraries/NetworkClientSecure  wird verwendet
exit status 1
AudioTools/Communication/A2DPStream.h: No such file or directory

[subbamaggus]

i will go to bed now... maybe i get further tomorrow.

thank you so much for your tips!

[pschatzmann]

The actual version of AudioTools is 1.2.2 and not 1.1.2.
If you want to use this old version you will need the examples from that...

[subbamaggus]

sorry, this is driving me nuts...

i guess bed has to wait.

i dont even know anymore how i got that older library. i am not intentionally using the older one.

i am working as a software engineer/developer for 20 years now... and i cannot get that to work... thats so frustrating... not your fault... i just feel so stupid...

EDIT:
i went to /home/maggus/Ardunio/audio-tools/ and did a git pull.
that let me compile the sketch.

starting A2DP...
[I] A2DPStream.h : 142 - Connecting to F2
[I] A2DPStream.h : 157 - Starting a2dp_source...
[W] A2DPStream.h : 347 - ==> state: Connecting
[W] A2DPStream.h : 347 - ==> state: Connected
[I] A2DPStream.h : 172 - a2dp_source is connected...
starting I2S...
[I] AudioTypes.h : 126 - out: sample_rate: 44100 / channels: 2 / bits_per_sample: 16
[I] AudioTypes.h : 126 -  sample_rate: 44100 / channels: 2 / bits_per_sample: 16
[I] I2SConfigESP32V1.h : 77 - rx/tx mode: RX_MODE
[I] I2SConfigESP32V1.h : 78 - port_no: 0
[I] I2SConfigESP32V1.h : 79 - is_master: Master
[I] I2SConfigESP32V1.h : 80 - sample rate: 44100
[I] I2SConfigESP32V1.h : 81 - bits per sample: 16
[I] I2SConfigESP32V1.h : 82 - number of channels: 2
[I] I2SConfigESP32V1.h : 83 - signal_type: Digital
[I] I2SConfigESP32V1.h : 84 - buffer_count:6
[I] I2SConfigESP32V1.h : 85 - buffer_size:512
[I] I2SConfigESP32V1.h : 86 - auto_clear: true
[I] I2SConfigESP32V1.h : 88 - i2s_format: I2S_STD_FORMAT
[I] I2SConfigESP32V1.h : 100 - pin_bck: 14
[I] I2SConfigESP32V1.h : 103 - pin_ws: 15
[I] I2SConfigESP32V1.h : 106 - pin_data: 32
[I] I2SESP32V1.h : 258 - dma_frame_num: 768
[I] I2SESP32V1.h : 162 - tx: -1, rx: 32
[I] I2SESP32V1.h : 284 - mclk_multiple=256
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] A2DPStream.h : 244 - set active
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops
[I] StreamCopy.h : 185 - StreamCopy::copy  1024 -> 1024 -> 1024 bytes - in 1 hops

this is what i get.

at least it compiles and does something.

now i need to read further how i can get the data in there.

thank you!
at least i was able to compile... usually when i do updates, sth breaks... a couple of weeks ago, my kernel paniced because of an update. story of my life i guess...

so i call it a day.
thank you sooooo much!

[subbamaggus]

i got a little further.

i chose to go with the example.

/**
 * @file basic-generator-a2dp.ino
 * @author Phil Schatzmann
 * @brief We send a test sine signal to a bluetooth speaker
 * @copyright GPLv3
*/

#include "AudioTools.h"
#include "AudioTools/Communication/A2DPStream.h"

const char* name = "F2";                        // Replace with your bluetooth speaker name  
SineWaveGenerator<int16_t> sineWave(15000);               // subclass of SoundGenerator, set max amplitude (=volume)
GeneratedSoundStream<int16_t> in_stream(sineWave);        // Stream generated from sine wave
BluetoothA2DPSource a2dp_source;                          // A2DP Sender

const uint8_t BTStatusConnected = 2;

volatile bool pressed = false;
const uint8_t buttonPin = 18;
int last_isr_counter = 0;
int counter = 0;

void ARDUINO_ISR_ATTR buttonISR() {
  if (counter - last_isr_counter > 10) {
    last_isr_counter = counter;
    pressed = true;
  }
}


// callback used by A2DP to provide the sound data - usually len is 128 * 2 channel int16 frames
int32_t get_sound_data(uint8_t * data, int32_t len) {
  return in_stream.readBytes((uint8_t*)data, len);
}

// Arduino Setup
void setup(void) {
  Serial.begin(115200);
  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);

  // start input 
  auto cfg = in_stream.defaultConfig();
  cfg.bits_per_sample = 16;
  cfg.channels = 2;
  cfg.sample_rate = 44100;
  in_stream.begin(cfg);
  sineWave.begin(cfg, N_B4);
  
  // start the bluetooth
  Serial.println("starting A2DP...");
  a2dp_source.set_auto_reconnect(false);
  a2dp_source.set_data_callback(get_sound_data);
  a2dp_source.start(name); 

  Serial.print("Connecting to Bluetooth");
  while(a2dp_source.get_connection_state() != BTStatusConnected) {
    delay(500); 
    Serial.print(".");
  }
  Serial.println(" Connected!");

  attachInterrupt(digitalPinToInterrupt(buttonPin), buttonISR, RISING);
}

// Arduino loop - repeated processing 
void loop() {
  counter ++;
  
  delay(50);
  if (pressed) {
    Serial.println(" pressed ...!");
    pressed = false;
    a2dp_source.set_volume(100);
  
    delay(100);
    a2dp_source.set_volume(30);
  
    delay(100);
    a2dp_source.set_volume(100);
  
    delay(100);
    a2dp_source.set_volume(30);
  }
}

that basically works pretty good for my idea. even timing and so on.

i only need to swap out the sinus with a "real" sound.

i will keep you posted!