I have the same problem (on released version not beta) on Apple Music. Restarting coreaudiod helps. Either find it in Activity Monitor and force quit (it will immediately restart itself, fixing the problem), or type the following command into Terminal:
sudo killall -9 coreaudiod
(You will need to type your password, just type it even if it doesn't show the ***'s). Tap enter and it will restart audio daemon. I know it's not a true solution, but until an update is available this is the quickest fix to get it working other than restarting your Mac.
Topic:
App & System Services
SubTopic:
Core OS
Tags: