B&W MM-1 cannot work well in 11.3/11.4

Hello Ryan_Tao,

It sounds as though you're having issues with an external audio device when connected to your new M1 Mac. Apple Support Communities is a great place for help! Is the audio device a Bluetooth speaker or headset? If so, try the steps outlined in the following article.

If a Bluetooth headset doesn't work with Mac

These steps can also apply to Bluetooth speakers. If you're having issues with wired speakers, or a different issue please provide a more detailed description of the issue you're facing and the product you're using to help guide us in the right direction for troubleshooting.

Have a great day!

Thank you for providing those clarifying details Ryan_Tao,

Since having this issue, have you tried using a different USB port on your Mac? If not, try a different USB port to help isolate the issue further.

Try an alternate user account created on your Mac. You can find the steps for creating a new user account in the following article:

Set up users, guests, and groups on Mac

If the issue continues in safe mode, and in another user account the next step would be to reach out to Apple. You can find their contact details via the Get Support website.

Take care!