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There have been several "surround sound from only two speakers" processes over the years. You may be referring to the one called Q-Sound, which was also used on Madonna's Greatest Hits that came out around the same time as the Michael Jackson album. I think that one was optimized for headphones. There was also "Holophonics", which was used on Pink Floyd's "The Final Cut" and I think also a couple of Roger Waters solo albums. Regardless of how "natural" stereo is, the vast majority of listeners prefer multi-channel recordings over monophonic. And the "speakers in the ceiling" thing sounds potientially problematic if microphones are being used. TravisH On 11/23/05, Per Boysen <per@boysen.se> wrote: > On Nov 23, 2005, at 7:24, Todd Pafford wrote: > > > I read an interesting article a couple of years back in Scientific > > American about a guy who was working on analyzing and modelling the > > way our ears locate sound. I recall there being a good description > > about the way in which the asymetrical shapes of our ears allow us to > > place sound in 360 degrees based on minute differences in timing, > > timbre, phase, etc between the sounds reaching each ear. Taking this > > information, some fancy math, and fast computers he was able to > > deliver a 360 degree sound field from just two speakers. Or he was > > trying at any rate. If I recall correctly, the system was real touchy > > regarding speaker and listener positioning. Can't help but wonder > > whether he ever succeeded. > > > He, or at least someone, obviously succeeded since such systems have > been around for a while. I listened to the system developed by Roland > many years ago (don't remember the name of it but it entered main > publicity by being used on a Michael Jackson record) but I must say I > did not hear much sound appear from outside the two speaker stereo > range. Maybe my ears have the wrong kind of shape or I wasn't sitting > at the sweet spot? > > The other day I also saw "surround headphones" at a computer store, > but I guess that must be a hoax? Probably it means that these > headphones does sum up the six surround channel outputs and play them > back as a convenient two channel mix. > > Anyway, no one has yet come up with a sound system that also play > sound from the directions below and above. Ahh... just remembered > this gig a while back where we were playing at a dance club and the > ceiling was stuffed with speakers. No particular direction in the > sound, but it was way cool to perform on the floor "in a circle > inside the audience" with sound coming all from above (as opposed > from playing on a stage with stage monitoring system). The most > "surround" going on there was actually the audience ;-) > > Greetings from Sweden > > Per Boysen > www.looproom.com (international) > www.boysen.se (Swedish) > ---> iTunes Music Store (digital) > www.cdbaby.com/perboysen > > > >