4 links
Quadraphonic: The Surround Sound of the Seventies
geocities.com
Includes history and information about the different formats, equipment, and encodings.
QuadraphonicQuad
quadraphonicquad.com
Information about multichannel sound, including quadraphonic, DVD-A, and SACD. Features a forum, and label histories with discographies.
Tab Patterson's Quadraphonic Sound Site
hometown.aol.com
Information about quad formats, featuring information about transfering quad records to CD-R.
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