Hello, I have a Mac Mini without optical audio, I buy a Soundblaster Live 5.1 USB Sound Card (working fine). When I play a 5.1 DVD sound play on 6 channels but for Divx or Mp3 sound play only on 2 channels (seems logical). How can I play stereo files on 6 channels ? (I do it with Ubuntu and Windows) Is it the same with internal sound card ? (sorry for my english) Thank you.