Make sure to check for potential problems while using the SoundSource trial if you have any "professional" audio system extensions installed. I have Dante Virtual Soundcard and a few others (I do live keyboard performance with my M1 Pro macbook), and SoundSource yields intermittently glitchy audio for me when using it casually to multiplex a few simple sources/destinations (Music, browser, bluetooth speakers). Core Audio is a very complicated piece of technology, so it's also very possible the issue is on Apple's side, or in the "pro" extensions themselves.

(That's as of now -- August 2025 -- so it's possible in the future this issue will be resolved. Don't take this as necessarily true if you're reading this in 2026 or beyond.)