M-AUDIO Revolution 7.1 - This high definition 7.1 channel surround sound adapter provides up to eight channels of professional quality 24-bit/192kHz audio. Revolution 7.1 allows PC and Mac owners to play DVDs and multitrack audio discs in surround sound, to experience more realistic gaming, and record or mix original music.<BR> Revolution 7.1 is the ultimate audio upgrade for your PCI-based computer. Play DVDs and all your music in surround sound, make games more realistic, and record or mix your own music. Up to 7.1 surround sound output at high-definition 24-bit/192kHz fidelity insures that you'll experience it all the way it was meant to sound?including streaming surround content from the Internet with Windows Media 9. You'll also enjoy robust gaming experiences with popular 3D audio technologies such as Sensaura, EAX, DirectSound, and A3D. Revolution 7.1 packs all this advanced technology into a small PCI card that's a breeze to install and use. <BR> As a part of Avid, M-Audio offers a comprehensive audio solution tor your PC or Macintosh desktop for general entertainment and music production. The Revolution upgrades any PCI equipped desktop with the best sound delivery possible. Full support for Microsoft Windows Media Audio 9 Professional Built-in SRS Labs Circle Surround II transforms CD, MP3 & other stereo content into incredibly lifelike surround sound High 107dB signal-to-noise ( SNR ) ratio & Exceptionally low 0.0031% distortion ( THD ) rating ensure clean, clear sound! Intuitive control panel adds easy access to advanced features like Bass Management, Speaker Optimization and Input Metering S/PDIF Optical Out One year warranty Includes valuable software bundle featuring - VJ Lite (full version); WinDVD 4 (Dolby Digital EX version); Propellerhead Reason (trial version);Ableton Live (trial version); Over 100 sounds and loops; Free M-Powered Artists CD sample; Wakeboarding Unleashed (pub