I had normal sound, traveled to a town and talked to a person, suddenly I noticed that when I turned my head to the right from the person talking, I hear his/her voice from my right earphone, while they are standing to my left side. It works like this with everything, footsteps, doorslams, every sound comes from the completely opposite direction.

Is there any way to reset the ingame sound software or something? Shake it loose?

Try to turn your headset 180 degrees (longitude) on your head. If you also have stationary speakers, you can test the sound and listen to what direction the sounds are coming from. If you play Final Fantasy 8, the http://www.techimo.com/forum/multimedia-audio/150044-headphones-sound-reversed.html.

Cheers,

KK