When I stream outputs 1-2, 13-15 or 17-18 (for example), I understand that those outputs are routed to the corresponding channels of the mixer. For the outputs 19-20, it’s routed to the USB channels, which is great.
But I don’t understand where outputs 21-24 are routed. By the way, outputs 23-24 are not supposed to exist per se because the CQ-18T can act “only” as a 22 output audio interface.
In the processing tab, we can switch the Bluetooth channel to USB/Card outputs 23-24 (but it should be available in the config tab as well, in my opinion). And indeed, it works.
Finally, outputs 21-22 do nothing in the CQ-18T, but I guess it’s related to the CQ-20B which can act as a 24/24 audio interface, so that Allen & Heath devs use the same code for both mixers.