prevent cutting off of first syllable

Author: nkansal96

CHANGES.txt

@@ -1,3 +1,7 @@
+0.1.1
+------
+- Keep 0.75s of data before speech starts to prevent cutting off of the first syllable
+
 0.1.0
 ------
 - BREAKING INTERFACE CHANGES

auroraapi/audio.py

@@ -9,7 +9,7 @@
 	from io import BytesIO
 
 BUF_SIZE      = (2 ** 10)
-SILENT_THRESH = (2 ** 10)
+SILENT_THRESH = (2 ** 11)
 NUM_CHANNELS  = 1
 FORMAT        = pyaudio.paInt16
 RATE          = 16000
@@ -173,8 +173,15 @@ def _pyaudio_record(length, silence_len):
 	)
 
 	data = array.array('h')
-	while len(data) == 0 or _is_silent(data):
-		data = array.array('h', stream.read(BUF_SIZE, exception_on_overflow=False))
+	while True:
+		d = array.array('h', stream.read(BUF_SIZE, exception_on_overflow=False))
+		if not _is_silent(d):
+			break
+		data.extend(d)
+		if len(data) > 12 * BUF_SIZE:
+			data = data[BUF_SIZE:]
+
+	yield data
 
 	silent_for = 0
 	bytes_read = 0

setup.py

@@ -10,7 +10,7 @@
 	# Versions should comply with PEP440.  For a discussion on single-sourcing
 	# the version across setup.py and the project code, see
 	# https://packaging.python.org/en/latest/single_source_version.html
-	version='0.1.0',
+	version='0.1.1',
 
 	description='Python SDK for Aurora',