Use the Sleep Timer
- Start playing music.
- Open the Menu and tap Sleep Timer, or tap the Sleep Timer button in Now Playing.
- Tap 15 Minutes, 30 Minutes, 45 Minutes, 60 Minutes or 90 Minutes, or End of This Song.
The music fades out over the last 30 seconds, then pauses.
To see how long is left, or to cancel, tap Sleep Timer again. To cancel, tap Turn Off.
Checked against the LuneOS code and installed apps. Nobody has tried these steps by hand yet, so tell us if something differs.