diff --git a/usermods/audioreactive/audio_source.h b/usermods/audioreactive/audio_source.h
index ad466e4f..4d4eb7de 100644
--- a/usermods/audioreactive/audio_source.h
+++ b/usermods/audioreactive/audio_source.h
@@ -122,7 +122,7 @@ class AudioSource {
        This function needs to take care of anything that needs to be done
        before samples can be obtained from the microphone.
     */
-    virtual void initialize(int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE) = 0;
+    virtual void initialize(int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE) = 0;
 
     /* Deinitialize
        Release all resources and deactivate any functionality that is used
@@ -191,7 +191,8 @@ class I2SSource : public AudioSource {
       };
     }
 
-    virtual void initialize(int8_t i2swsPin = I2S_PIN_NO_CHANGE, int8_t i2ssdPin = I2S_PIN_NO_CHANGE, int8_t i2sckPin = I2S_PIN_NO_CHANGE, int8_t mclkPin = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE) {
+    virtual void initialize(int8_t i2swsPin = I2S_PIN_NO_CHANGE, int8_t i2ssdPin = I2S_PIN_NO_CHANGE, int8_t i2sckPin = I2S_PIN_NO_CHANGE, int8_t mclkPin = I2S_PIN_NO_CHANGE) {
+      DEBUGSR_PRINTLN("I2SSource:: initialize().");
       if (i2swsPin != I2S_PIN_NO_CHANGE && i2ssdPin != I2S_PIN_NO_CHANGE) {
         if (!pinManager.allocatePin(i2swsPin, true, PinOwner::UM_Audioreactive) ||
             !pinManager.allocatePin(i2ssdPin, false, PinOwner::UM_Audioreactive)) { // #206
@@ -412,6 +413,7 @@ public:
     };
 
     void initialize(int8_t i2swsPin, int8_t i2ssdPin, int8_t i2sckPin, int8_t mclkPin) {
+      DEBUGSR_PRINTLN("ES7243:: initialize();");
       if ((i2sckPin < 0) || (mclkPin < 0)) {
         DEBUGSR_PRINTF("\nAR: invalid I2S pin: SCK=%d, MCLK=%d\n", i2sckPin, mclkPin); 
         return;
@@ -527,7 +529,7 @@ class ES8388Source : public I2SSource {
     };
 
     void initialize(int8_t i2swsPin, int8_t i2ssdPin, int8_t i2sckPin, int8_t mclkPin) {
-
+      DEBUGSR_PRINTLN("ES8388Source:: initialize();");
       if ((i2sckPin < 0) || (mclkPin < 0)) {
         DEBUGSR_PRINTF("\nAR: invalid I2S pin: SCK=%d, MCLK=%d\n", i2sckPin, mclkPin); 
         return;
@@ -584,7 +586,8 @@ class I2SAdcSource : public I2SSource {
     /* identify Audiosource type - I2S-ADC*/
     AudioSourceType getType(void) {return(Type_I2SAdc);}
 
-    void initialize(int8_t audioPin, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE) {
+    void initialize(int8_t audioPin, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE) {
+      DEBUGSR_PRINTLN("I2SAdcSource:: initialize().");
       _myADCchannel = 0x0F;
       if(!pinManager.allocatePin(audioPin, false, PinOwner::UM_Audioreactive)) {
          DEBUGSR_PRINTF("failed to allocate GPIO for audio analog input: %d\n", audioPin);
@@ -755,7 +758,8 @@ class SPH0654 : public I2SSource {
       I2SSource(sampleRate, blockSize, sampleScale)
     {}
 
-    void initialize(uint8_t i2swsPin, uint8_t i2ssdPin, uint8_t i2sckPin, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE, int8_t = I2S_PIN_NO_CHANGE) {
+    void initialize(int8_t i2swsPin, int8_t i2ssdPin, int8_t i2sckPin, int8_t = I2S_PIN_NO_CHANGE) {
+      DEBUGSR_PRINTLN("SPH0654:: initialize();");
       I2SSource::initialize(i2swsPin, i2ssdPin, i2sckPin);
 #if !defined(CONFIG_IDF_TARGET_ESP32S2) && !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32S3)
 // these registers are only existing in "classic" ESP32