I have Q20’s that I used for ever with High Sierra. With Big Sur they only work right if I have the “Sound Input” preference pane open. Once I close it all my sound starts to clip like crazy.
I tried 3 other bluetooth devices and they all work fine.
I’m thinking it might have something to do with the bluetooth codec but
- I don’t know much about bluetooth codecs
- Apple changes it’s interface to bluetooth codecs with Big Sur. (Removed Bluetooth explorer from Xcode 12)