Fix sample rate for tests to 44100

These md5's were recorded at 44100, but Settings default sample rate
changed to 48000

Author: jcavar

Tests/AudioKitEXTests/DryWetMixerTests.swift

@@ -9,6 +9,11 @@ class DryWetMixerTests: XCTestCase {
     let input1 = PlaygroundOscillator(waveform: Table(.triangle))
     let input2 = PlaygroundOscillator(waveform: Table(.triangle), frequency: 1280)
 
+    override func setUp() {
+        super.setUp()
+        Settings.sampleRate = 44100
+    }
+
     func testDefault() {
         let engine = AudioEngine()
         let mixer = DryWetMixer(dry: input1, wet: input2)

Tests/AudioKitEXTests/FaderTests.swift

@@ -6,6 +6,11 @@ import XCTest
 
 class FaderTests: XCTestCase {
 
+    override func setUp() {
+        super.setUp()
+        Settings.sampleRate = 44100
+    }
+
     func testDefault() {
         let engine = AudioEngine()
         let url = Bundle.module.url(forResource: "12345", withExtension: "wav", subdirectory: "TestResources")!