I know that this post is unaligned with the current flow in the topic 
I have a problem that i’ve been struggling with for some time today, i’ve tried the best i can to find solutions, but (again) i have to go to the mighty gods and ask for their help!
Case: I have a Zaquencer sending some drum pattern to a chain on MIDI CH10. Everything there working fine. At the same time i want to record a pattern in Zynstep while the Zaquencer is sending its drum midi notes. The Zynthian is set to Clock Source: MIDI, and the Zaq sends SYS START, CONTINUE and CLOCK, and that also works , meaning when i hit start on the ZAQ, i can hear the drums playing, the pattern starts to run and i can record some keyboard MIDI notes in the pattern. Except that the drum midi notes the Zaq plays are ALSO recorded in the pattern. I can assign midi channels to both my chains and my pads, and they seem to be correct - the drum is on a fabla chain receiving CH10 and the keyboard is Pianoteq Vintage reeds on CH1. It seems like when your in pattern edit/record mode the pattern editor receives all channels no matter what.
Or is there a way? I cannot find it…