This has been an issue for quite awhile for a LOT of people and I'm very hesitant to post this as it has STILL not been fixed after all this time. Around early 2015, a patch was released for Far Cry 4 and since then, I've not heard the music that plays while exploring. I still play this game a LOT because my cousin and I love the CO OP on it. But I miss hearing the songs, such as The Mountain Watches and Unfamiliar Paths. It really takes away the atmosphere of the game.
Yes that's so boring :/ I bought the game for my PC and my PS4 and this happen since the v1.09 update in both versions. I downloaded the v1.08 And I can hear the music again so I always play that version now. I've contacted the support but they can"t help me. PLEASE UBISOFT WE NEED A FIX FOR THIS PROBLEM !!!