I’m in 64-bit Win 10 Audacity 2.4.2. I’m a retired recording engineer, with DAT tapes I need to archive to .wav files. I have a Zoom U44 interface to a Tascam DA-20 MKII DAT. Windows and Audacity see the Zoom interface, which takes S/PDIF coaxial from the DAT machine, and I hear the stream on headphones plugged into the U44. The U44 is selected as Recording input. The Import window only shows files on the PC. Sample rates are set to match (48 kHz). If I roll the tape, I hear it in cans at the U44, but if I hit Monitor in Audacity, I don’t see audio, and if I hit record, I don’t see audio on the tracks.
So my need at this point is simple – I need that long DAT track (and I have a bunch of them) that I want to end up as a .wav file on the computer. Once I have them on the computer, I’m good.
As the U44 is a 4 channel interface, it may be sending the S/PDIF input to output channels 3 and 4.
See if you can set Audacity to record 4 channels in the Device Toolbar.
If that works and you get the recording in tracks 3 and 4 (with tracks 1 and 2 empty), then you can delete tracks 1 and 2 (click on the [X] in the top left corner of the track) and join the remaining tracks to create a stereo track (see: https://manual.audacityteam.org/man/splitting_and_joining_stereo_tracks.html)