If you're using the Behringer UMC404HD then try what I wrote in the post above yours. Hmmm.do I need to return this laptop as well? Argg.which laptop is safe for sound and Linux and AV now? I'm not tech savvy, so I doubt I can do a work-around, unless it is pretty simple. Now, 2 days after installing - it's having the exact same problems. I put on AV MX21 Wildflower Linux with Debian 11. Then I purchased, just arrived and set up an HP 2021 Ryzen 5 laptop. And it was getting worse over the 3 weeks. But then during the wait time, I was finding that the sound issue was also getting into my general web listening.so that during the wait time, I couldn't listen to or watch anything. What I did find over the 3 weeks was that if I waited about 5 minutes, the sound would somehow right itself. Three weeks ago I bought an Acer Swift 3 AMD Ryzen 7 laptop and then just returned it because Musescore was stuttering, audio gaps, repetition.