Tascam 16x08... or 4x4 & 2x2 (multi-source)

Audacity as a rule can’t deal with multiple different devices. You get one, but that one can be multi-channel.

https://forum.audacityteam.org/t/multi-channel-recording-in-audacity/15644/1

They don’t all work and there’s no way to know unless somebody posts one way or the other.

I believe Audacity can only play stereo.

Koz