audio_test example -help required

[petercwallis]

I have tried to add code to the audio_test example so that sound is detected by an MAX9814 mirophone from Adafruit connected to the adc on a rp2040 pico. I think I have set up the tusb_config.h file and the usb_descriptors.c correctly to send 16kHz, 2 bytes per sample (unsigned) to the host. I remove the adc_read and replaced it with a constant value, and when I plug it into a machine running audacity. I find the microphone and get data, but rather than a lovely straight line, I get a beautiful saw-tooth wave.

I guess I am using tud_audio_write(uint8_t *, unit16_t) wrongly. Anyone got any pointers? This could certainly be better documented.

Thanks in advance
p

[siddhartha993549]

Hi,

Can you please explain, What exactly is audio test example supposed to do ?