Share Screens

Hello!

So, I've been using the share screen function to play music videos with absolutely no problem. Then, all of a sudden, when I do the music it garbled. If I don't share screens it's perfect, so I know it's not the computer (Mac). I've uninstalled ZOOM and reinstalled and it fixed it for a week. Then it went back to the garbly. I of course of clicked the 2 boxes (share sound and optimize) and it doesn't work. It's fine if I play a video of someone talking, but not with music. 

Please help!