I’ve come across a strange error. I copied a segment in one lane and edited it. I listened to it and I still could her the sound. But then when I played the whole song back, I could only hear my bassline and the copied segment of my lead melody at the end of the song (There were other MIDI segments prior to the segment I edited in the same lane but I couldn’t her them). The problem is that I haven’t toggled mute or solo on at any time. I checked it and all lanes were turned on and the volume meters of the individual lanes showed activity. I disconnected and connected again to JACK with no success. I tried to export it and I still could only hear those two snippets while the whole length of the song was correct.