1 of 1 people found this helpful
1. What's the OS of your phone? The volume is usually set by the codec, not on the module.
2. For the module kit board, you need to comment the following code to disable the mute function. Or the I2S output will stop because the button interrupt.
#define AUDIO_MUTE_UNMUTE_ON_INTERRUPT // if defined, the app will mute/unmute audio while streaming on button press