I routinely trip over my headset cord, and when I inspected the 3.5mm jack, it seemed slightly bent. I suspect my tripping has bent it, but I digress. The headset in question is a Logitech G340, and I am frankly stumped. I use the dual-3.5mm jacks, instead of the usb option, so usb input is not the issue. When I attempted to use the headset on my phone in place of my PC, the same issue emerged, so I am certain it is something to do with the headset. Thanks.