Hello, I was wondering if an external sound card with a usb port to plug in headsets that require power exist. The onboard sound has had issues for over a year, sound from the left channel being miniscule for both USB headsets and bluetooth headphones and speakers. The aux port on the motherboard seems to be the only place where sound comes out equally from both channels. I only have one functioning PCI slot for the video card so an internal card is out of the question. I'd appreciate any sort of help finding something that will fix this dire situation. Thaaanks