Brian Moura's Home Page: Features lists of multi-channel SADC releases, both current and forthcoming.High Fidelity Review: DVD-Audio and SACD news and reviews.Quadraphonic: The Surround Sound of the Seventies: Includes history and information about the different formats, equipment, and encodings.QuadraphonicQuad: Information about multichannel sound, including quadraphonic, DVD-A, and SACD. Features a forum, and label histories with discographies.Surround Sound Discography: Listings of surround sound recordings in many recording formats and encoding systems.SurroundMusic.net: Features news and reviews of recordings.Tab Patterson's Quadraphonic Sound Site: Information about quad formats, featuring information about transfering quad records to CD-R.