Hey, I've got a problem with this headset (usb soundcard included), when I connect the usb, sound works great as usual but after cca. 25-30mins it goes bad, vnt voices are 5x faster and sound ingame (cs) aswell. After this I have to restart vnt, cs and reconnect my usb soundcard to get it fine again.. but just for a while. Would appreciate for help, thx.