I have been using the Qu-16 to record, but for some reason when I playback- the audio routes to 2 channels instead of one to one for the channels recorded. I’m not clear how to set up to record/playback audio where Record-channel 1-16 correspond to Playback-channel 1-16…I thought I had it when I first got the board, but seem to have lost my “recall” on how to do this…I look forward to your input…
Record and playback over what interfaces?
What does your I/O patching look like?
Qu-16 is the interface. I want to know proper patching so that everything is one-to-one for playback. When I’ve played multitrack USB streaming audio back into the Qu-16 it comes back stereo. This may be due to the DAW and if anybody has experience with Reaper and has a Project Template with the associated Routing Matrix of the DAW, this may solve my issue, if you are willing to share. I’m looking at pg. 57 in the manual and will see if I have my Qu-16 set similarly. FWIW, I also have Digital Performer 7.24 and Mixbus 3 on the Mac, so if you have a solution with either of those DAWs, I will certainly consider using that instead of Reaper.
So, USB-B connection to a Mac (so core audio).
Reaper as a DAW. Hopefully someone with more experience can step in now 
I’m assuming that the daw is currently using the “wrong” interface, and is down mixing and playing stereo, not outputting multitrack, but I’ve no idea where that option is…
I believe the DAW is using the correct interface, but is outputting the stereo master buss back to the Qu-16.
Probably want to be asking on a reaper forum then really… PS. You have got all the channels set to USB input, and the global USB source as B?
If you are using Reaper, just check out the Routing matrix. With a new project every channel is mixed into the master channel which then is output as a stereo mix to your audio interface (-> Qu).
Use the routing matrix to re-assign each channel’s output to use the appropriate return channel. Shouldn’t be too complicated.
same procedure in every DAW capable of multiple track playback
every track should have it’s own output
Thanks to dhak for directing me to this forum thread:
https://community.allen-heath.com/forums/topic/reaper-not-working-with-qu-24