A real pain, is this. Have gone over the soldering and checked for dry joints etc. I have added some grounding and shortened the cables a little. all unused inputs are grounded and all pots are in place
I still get the odd cymbal triggered off the snare. I still get a rim instead of hi hat sometimes. Still get the odd bass drum instead of a cymbal..
When the xrosstalk occurs, there is no activity on any other channel . Crosstalk velocity is high too.
Might roll back the firmware and give that a go