- A simple USB device
You need to hit it closer than that. What device?
I think it’s still true Audacity won’t play multi-track. Your choices are mono and stereo.
Koz
Plus, without special software/drivers a Windows application can only record from one device at a time and play through one device at a time.
The best solution for multi-channel playback is a 5.1 channel or 7.1 channel soundcard (but not with Audacity).