LOL NO SOUND IN GAME!

Nothing changed on my computer, all other sound is on, i can hear the game and everything works fine until i load into summoners rift, nothing is muted in the mixer. So it would be really great to figure out why all of the sudden when nothing changed my sound just suddenly doesn't work in game. LOL

Never had any issues before but now all the sudden, i cannot stand to play a game with 0 sound.