Audio Troubleshooting External Soundcard

Installed Bazzite two days ago and I am trying to troubleshoot my Audient iD14 mkII. Pair of very odd problems:

• Audio is mixing up right and left channels -- left comes in right, right comes in left.
• Said left channel is also coming in at like 50% volume.

Seems like it thinks its surround sound rather than headphones? There doesn't seem to be a setting to change it in Settings -> Sound. Not sure how to try and fix this.