No audio output from Daisy Patch SM (MCU working fine)

Hello everyone,

I’m having an issue with my Daisy Patch SM — the board powers up and the red LED on the Daisy Patch SM turns on normally.
I can upload and run sketches through the Arduino IDE without any problem, but I get no audio signal at the outputs (B1/B2), even when testing with a simple 440 Hz sine wave.

Here are some details:

  • The board is powered from an Eurorack ±12 V supply (A5 = +12 V, A1 = −12 V, A4/A7 = GND).

  • Audio connections: OUT L = B2, OUT R = B1.

  • The module is recognized by the computer and successfully flashes code, but there’s still complete silence on the outputs.

I’m a total beginner but i was able to make some effects works (but not potentiometers), but since an hour or so, impossible to ear anything anymore.

Could you please advise on further checks or repair options?

Thank you for your help :slight_smile: