One needs to define what you want from height speakers. For concert hall ambience if one has an impulse response of the hall that is 3D and thus includes the height vectors, you can simply use elevated speakers in any number you like and feed them the overhead reflections derived from convolving that part of the hall impulse response. I do this since I have built a room with two very high balconies where the elevated surround speakers can sit. But height ambience is not all it is cracked up to be. Reflections from the ceiling in a concert hall are essentially mono with a high IACC and so are not very interesting to the brain. So it is normally better, if on a limited budget, to concentrate on ambience speakers at the sides and rear.
Direct sound height is another matter and normally does not apply to music. The Panambiophone can make front, rear and overhead pairs each isolated from one another. If you play the height pair crosstalk cancelled through two elevated speakers (picture of this in my AES RACE paper) you do get a nice elevated stage normally placed to the front. One could also hear direct sound sources between the horizontal plane and the elevated one which was a surprise to me. But there are few heavenly choirs to record and so little has been done with this. I think it is only of use for games and movies. For these you would likely want both front and rear elevated XTC pairs and you can then synthesize the eight channels a process which is now normal for games and movies which almost never see a microphone or at least one that is not mono ready for panning. Ralph Glasgal www.ambiophonics.org From: Stefan Schreiber <[email protected]> To: Surround Sound discussion group <[email protected]> Sent: Monday, May 30, 2011 11:10 AM Subject: Re: [Sursound] New filter Would you not need at least six speakes (or three Ambiodipoles) for proper 3D sound, in Ambiophonic context? (One speaker-pair would have to be fixed above head, at least in my current interpretation.) Thanks for clarifications Stefan Schreiber -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20110530/1d31605d/attachment.html> _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
