Desktop Rev 2 8voice - no sound coming out of B output in multimode

[BoughtAProphet]

This is most likely user error but I switched my desktop to multi mode. I put the MIDI channel to 15, which works for the A layer. When I switch to B, and to channel 16 I get no sound. I have tried 1 cable out of the left and also 2.

Can someone walk me through how to set this up? I'd like to have chords on layer A and bass on B if possible.

[BoughtAProphet]

Figured it out - I didn't have stack A+B pressed...doh.

Also for anyone who looks this up, you need to have both left and right outputs plugged into out B or the B layer will still play out of the mains as well.