Hi guys nice to meet you. It's been a couple of days since i have this problem with my op-1. Sound from a key is stucked. Sometimes just doesn't make any sound at all, but must of the time it's stuck. I made this video to show you guys the problem: https://www.youtube.com/watch?v=ux5wwLhEEb8
Do you know what's wrong? And what can i do to fix it?? thanks