Surround sound 7.1

I recently reset my Yamaha unit and reconfigured it using the mic and everything but listening to music the sound is noticeably less full. Volume as well is quiet and it seems to no longer use my 7.1 surround system correctly. Is there any way to assure its using the full 7.1 system? I've...

Can you disable Surround Sound 7.1 in certain applications so that I can listen to my friends on Skype with Surround Sound but play League of Legends without surround sound. because if surround sound is enabled i can only hear out of 1 ear.