Soundtrack No longer plays ingame ( Subnautica ) PC ver 61056

Mazzy

As the heading says i have lost my ingame soundtrack.
I have Voice & all Ambient sounds.
But the music score ingame is gone.
I now Only hear the shallows music score at the menu but as soon as i enter the game it is gone
I can be ingame for 2 hours and not a single soundtrack will play now.
I have tried different things for the past week but no luck has anybody experienced this on PC any ideas ?

Only change to my PC was the very recent Windows update for my Win 7 64 Bit pro.

Mazzy

My sound track has completely gone vanished i can be ingame for 2-3 hours going from biome to biome. I now only get the ambient sounds. My sound track is gone and i have played this game since launch. This only happened recently approx 1 month ago.

Playing the game without it has taken a lot of the subversiveness away.

I have tried everything any ideas please.