@the-ivor, regarding the above link and this one from the article: https://ledgernote.com/columns/gear-reviews/best-audio-interface/ - All of these are listed on the Alsa-Project link as compatible, except the Presonus Audiobox. The Steinberg UR22 isn't explicitly listed but there are other Steinberg's on there, so that suggests it should work too. Things have changed a lot with class-compliance in the past 5-10 years. Most interfaces should work. I'd just make sure to do a Google search to confirm before clicking buy on anything.