Sync buzz noise problem Moderators: altitude, adafruit_support_bill, adafruit, phono, hamburgers

[toumpouris]

Hello everyone,
I have a x0xb0x/x0xi0 version, its the one with a delay on the back of the unit, that I bought used and assembled.

There is a buzz in the signal, something like continuous saw/square wave on the background, but ONLY when the unit is in sync mode, either MIDI or DIN in.
When is in internal sync its totally quiet.

Any idea where the problem would be?

Thanks