Hercules Gamesurround Muse 5.1 DVD 6 Channel Surround Sound Adapter Card 3 stereo outputs for headphones, 2.1, 4.1 or 5.1 speaker systems Dolby Digital Home Cinema experience Digital music on 5.1 channels D audio with Sensaura engine included for a realistic gaming experience on up to 5.1 speaker kits Great software suite including PowerDVD 4.0