Hey Fatboyy,

Just to double check, have you made sure that the in-game audio options are set properly and that the disable in-game audio box is unchecked? These are separate from the audio options in pvp.net. If those are all correct, tab out while in the game and make sure that all of your windows sound settings are correct and that windows in attempting to run the game in stereo and not any form of surround sound.

If neither of these work, let us know and we'll proceed from there.

Thanks!

I am also experiencing this issue, I have been doing some troubleshooting but nothing seems to work. I have not reinstalled

I found that the lol game client was muted in the volume mixer. Because windows 7 allows control of volume settings for individual applications; I believe it got muted by the global mute button on my keyboard and the application was closed before the mute was removed. I had suspected this was the issue but for some reason the game itself was not showing up in the sound mixer, only the PVP.net client. I created several games and watched the mixer to see if it would ever appear, eventually it did and sure enough the volume was turned all the way down. If you haven't reinstalled you might want to look at your sound mixer.