Just got back from vacation and the app has changed. When the TV is on, it says TV Audio

HDMI.  No problems until I use ear buds. I change by going to sound settings. The problem is when I change back to ARC. The app shows My Music empty que and then I get no sound. H.ow do you switch my music to tv audio on the app. In a nutshell how do you change tv audio from my music.