Not sure if this is the right thread to get help with audio issues, but when I'm playing Starcraft 2: Heart of the Swarm, every time there's a cinematic voice audio is screwed up when listening in my headphones (but not through speakers).
I'm using the Logitech z506 5.1 Surround System, and I have only the 2 front and 1 center speaker connected, and I'm plugging the headphones into the headphone jack on the speakers.
When I play the sound directly through the speakers, it works fine, and when I plug the headphones into the HD Audio jack on the front panel of my case it also sounds fine.
The only thing that doesn't sound fine is headphones specifically plugged into the speakers. Also, the only thing that's messed up is
voices in
cinematics. voices in-game, sound effects/music in cinematics, etc all sounds fine.
Not sure if it's relevant, but this is my speaker configuration: