I recently got this USB sound card, and in the Audio MIDI Setup Utility I can choose it as the default output, and under the Output Tab choose 6 channel. The problem is when I go to Configure Speakers. I can choose 5.1 setup, and click on each bubble and it will play out the respective speaker, but when I quit the application and re-open Audio MIDI Setup, 6 channel is still there, but under Configure Speakers, it reverts back to Stereo. Also, when I play a DVD in DVD Player or VLC, sound only player from two speakers and subwoofer. Thanks you so much for your help!!