4 Channel Surround Sound Microphone Arrays are under preparation and will be published on updates to this CD-ROM at a later date and/or at www.soundscot.com

Equal segment microphones arrays for 4 channel ("Quadraphony") and 6 channel ("Hexaphony") recording were presented at the 91st AES Convention in New York in 1991, Preprint 3157 under the title « Microphone Arrays for Natural Multiphony » by Michael Williams.

Contact Mike Williams at soundsscot@aol.com to register for information about future updates.