- Ambisonic.Net
 - Offers extensive information about ambisonics method of surround sound encoding with equipment listing, faq, and technical articles. - Sony Dynamic Digital Sound (SDDS)
- Features digital sound with stereo surround channels and a full range sub-woofer channel designed exclusively for motion picture theatres.
- SurroundMusic.net
- Offers a guide to surround music DVDs, SACDs, and CDs.
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