I had this module on my raspberry CM4 IO board: Adafruit MAX98357 I2S Class-D Mono Amp The module works perfectly on my IO board, but when I made my board (see diagram) it just keeps on grunting when I boot the CM module and if I turn on e.g. music via mplayer the speaker stops grunting and is silent, if I turn off the music it just grunts again. I can't seem to get it to work. I did the installation using this guide:https://learn.adafruit.com/adafruit-max98357-i2s-class-d-mono-amp/raspberry-pi-usage Thank you for your advice schematic

  • Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking.
    – Vadim
    Oct 6, 2023 at 6:58

1 Answer 1


It is possible that there had been some manufacturing error with your own board. Try to troubleshoot your PCB. See if there is a short circuit. Test with a multimeter.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.