When I was working on a project earlier today and everything was just fine, then Ive been doing some other stuff and when I came back and played back a choir part, I heard percussion comming from that same channel. So I checked the settings of the percussion instrument and saw that the output changed from 10 to 1 and the midi channel changed from 10 to 10+groups. I was able to set the output back to 10, but somehow I cant change the midi channel. In the channel list there no '10+groups', only a channel 10, the instrument is set to channel 10, but still its stuck to 10+groups... How can an instrument change like this? What is 10+groups? I havent seen this before and I like to understand what is happening. How do I change the midi channel to the channel I select from the midi channel list?