I've been going down a RaspberryPi rabbit hole looking for a USB Audio recording solution, I've found HATs, scripts and just now an application which might actually be exactly what I needed 😇
At first I was considering adding a Raspberry Pi Codec Zero HAT and just using a line in for AUX but I really don't want to split the audio to be able to monitor it... but I love the idea of a Pi Zero recorder 👏
I kept digging for a few days until I was just going back over all of the results when I found Z-LiveRec which seems to allow USB Audio recording and a direct VNC connection to the app so the Pi can be headless, then I'll just need to test if a Pi Zero 2 is fast enough as they stated the app is sluggish on it versus a Pi 3+ but hopefully this is the answer! 🐸