bertbertbertbert wrote:Thanks alot, I will try that. But i just don't get why this 63 note is coming through even when i set everything to 0.
It must have been set somewhere, you just overlooked it. It cannot come from nowhere.
Just to be sure, I can connect a piezo directly to the board, without a jack connection inbetween, right?
Why not? Of course you can. Just make sure you identified the ground pins correctly.
And I can connect the ground from piezo ring to piezo ring?
If you mean jacks, then the ground pin on all jacks is a sleeve pin. If you use stereo jacks, the tip pin is for heads/bows and the ring is for rims/edges.