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Circle Surround II Comes to M-Audio Devices

SRS technologies in Sonica Theater, Revolution 7.1 By Dave Nagel
SRS Labs says its surround sound technologies are now included in two of M-Audio's audio output devices, including the Revolution 7.1 PCI-based sound card and the Sonica Theater USB system. Both are available for Macintosh and Windows.

Both the Sonica and the Revolution offer 7.1 channels of audio output, as well as DTS and Dobly Digital 5.1/EX and stereo output. With the addition of SRS Labs' Circle Surround II technology, the devices now also multi-channel surround sound from any source, including, mono and stereo audio from audio CDs, MP3s, games and the like. Circle Surround II dynamically separates instruments, vocals and crowd noises for a multichannel surround experience. Sonica and Revolution also include SRS Labs' TruSurround XT mode for emulating surround sound in a stereo setup.

The Revolution 7.1 PCI card offers 7.1 channels of high-definition audio output (24-bit, 192 kHz), recording capabilities (24-bit, 96 kHz), real-time stereo to surround conversion, 107 dB signal to noise and support for DTS and Dolby Digital 5.1. Sonica Theater offers similar specs but in a USB configuration: audio output at 24-bit, 96 kHz; recording at 24-bit, 96 kHz; real-time stereo to surround conversion; 7.1 channels of output; 101 dB signal to noise; and support for DTS and Dolby Digital 5.1. Both also come bundled with $200 worth of software.

The Revolution 7.1 card and Sonica Theater system are both available for Mac OS 9, Mac OS X and WIndows. Both sell for $119.95. For more information, visit

Contact the author: Dave Nagel is the producer of Creative Mac and Digital Media Designer; host of several World Wide User Groups, including Synthetik Studio Artist, Adobe Photoshop, Mac OS, Adobe InDesign, Adobe LiveMotion, Creative Mac and Digital Media Designer; and executive producer of the Digital Media Net family of publications. You can reach him at

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