I've seen some old threads and a newer one with that issue and a "wait a future patch" official response, it's been up since launch and still nothing.
I only get the ambient/background/exploration music in Norway, after that, nada. I've toyed with all the audio options, my music frequency is set to high and I still never hear the soundtrack playing, except on syncing viewpoints. Things I tried that didn't work:
Reinstalling, starting a new game, loading previous save, fast travelling, hard restarting the Xbox, changing the Xbox's audio settings, changing the game's settings, changing volumes, meditating on repeat until I force a song to play (that works only for that song, then it's silent for the rest of the session).
Anyone else still having this problem or it's just me? Any help would be appreciated!