USB audio recording works on Zero using different audio inputs: XLR, 1/4" Line in, TRS, and RCA.
Every single USB audio interface I own has worked like a champ on Zero board running TwisterOS Beta4 for audio input recording. Latest Audacity 2.3.3 tested. Amlogic USB audio codec on Zero working great.
Tested it so far with: Roland UA-1EX(USB audio interface), Zoom R24(USB multitrack recorder), Allen & Heath ZED 12FX(USB Multitrack Mixer), Behringer UCA-222 (USB audio interface)
