Hi BassBiscuit and welcome to the forums. The only audio “interfaces” that we support are our own ElkPi and the HifiBerry line of audio hats. There are a few other audio hats that use the same codec as the HifiBerry that probably will work, but we don’t officially support them. They’re basically knockoff of the HifiBerry design. See this thread for more details. Raspberry pi with builtin audio
USB audio interfaces will not work with ELK, basically the ultra low latency of ELK requires a much closer integration with the audio codec than what is possible using a USB connection.
Regards
Gustav