O Everything

When I have this problem with wired headphones, if I leave Background Music open, switch my system audio device to the computer speakers, switch the Background Music output device to...

But if that doesn't work then just mess with the hz output in Audio MIDI Setup a bit then bring it back to 48k.

And if that still doesn't work then idk about a fix for it.

I found that restarting the computer works to fix it. After restarting, open Background Music before you play any media and it should be fine.