Hi, I'm thinking about buying new PC, so I checked recent motherboards and discovered they often offer 'unique' sound features and new codecs. I also have plans to buy external headset featuring it's own sound processor with multichannel sound such as 'Sennheiser GSP 350' or something similar. My question is does build-in motherboard's sound codec affect sound quality of such headsets or they work independently from each other? Do I hear any difference while being in a headset if my system supports DTS or other features?