I think I found what the problem is, in the i2s_config there are settings for the dma buffer count and length. If I adjust the values, I can reduce the noise, or if they're too large, they seem to introduce echoing/reverb. I'm not sure what the correct values are though. In this example ( https://gi...

I've been playing with the MAX98357A ( https://www.adafruit.com/product/3006 ). I've been using SparkFun's ESP32 Thing ( https://www.sparkfun.com/products/13907 ) with the motion shield ( https://www.sparkfun.com/products/14430 ) to play .wav files from an SD card. I used audacity to convert the ste...