This is peculiar:
Device ID: 3
Device name: UMC404HD 192k
Host name: Core Audio
Recording channels: 4
Playback channels: 4
Low Recording Latency: 0.01
Low Playback Latency: 0.00455782
High Recording Latency: 0.1
High Playback Latency: 0.0147166
Supported Rates:
I’ve never seen a real hardware device show up as both a Recording device and Playback device as one device. Usually real hardware shows up like “Built in” device, with separate entries for recording and playback:
Device ID: 0
Device name: Built-in Microphone
Host name: Core Audio
Recording channels: 2
Playback channels: 0
Device ID: 1
Device name: Built-in Output
Host name: Core Audio
Recording channels: 0
Playback channels: 2
I’m not sure where to go from here…
If you shut down your computer, disconnect the UMC 404HD, then reboot the computer, can you get Audacity working properly with the Built-in sound card?