Hi -2020Gordon-,
Thanks for reaching out in Apple Support Communities. I understand that Apple Music on your Apple TV isn't playing properly and you're seeing that the time bar is moving, but no sound can be heard. I know it's important to be able to utilize your Apple Music subscription on all of your devices; I'd like to help. I recommend that you start with these steps:
- Apple TV: Double press the TV/Home button and swipe left or right to find the app with the issue. Then swipe up to close the app. You can’t force apps to quit on Apple TV (3rd generation).
Restart your iPhone, iPad, iPod touch, Apple Watch, or Apple TV. Then open the app to see if it works as expected.
Make sure that your device has the latest version of iOS or iPadOS, watchOS, or tvOS. Then check for app updates.
- Apple TV: Go to Settings > Apps and turn on Automatically Update Apps. If you don't have automatic updates turned on, you can open the App Store, go to the Purchased tab, and open an app's product page to see if an update is available."
If an app unexpectedly quits, stops responding, or won’t open
Try again to play music on your Apple TV and let me know what you find.
Best Regards.