I remember this illusion from a presentation given around 1982 at the AES in Los Angeles at the Disney Convention Center. If there is an MP3 available of that descending tone I'd like to hear it. I believe it was actually sung by a chorus. Malcolm ******* On 4/21/2015 3:13 AM, Doug Pomeroy wrote: > Years ago the Audio Engineering Society issued two Flexidiscs > of auditory illusions. One by Diana Deutsch of the University > of California at San Diego, and the other by Michael Kubovy > and Jane E. Daniel of Rutgers. Fascinating illusions, one being > a descending tone which doesn't really descend! > > Doug Pomeroy > Audio Restoration and Mastering Services > [log in to unmask] > > >> Date: Mon, 20 Apr 2015 19:17:39 -0700 >> From: Lou Judson <[log in to unmask]> >> Subject: Re: Flexi Discs are back >> >> Hah! While we reminisce, I still have a National Geographic one that = >> even has a cardboard sleeve, called Sounds of Space, which I should = >> listen to again. >> >> And as a teen I had the Mad Magazine song =94She got a Nose Job=94 = >> (=93It=92s now turned up instead of hanging down=85=94) to the tune of = >> Get a Job. I think. >> >> Yup: <https://www.youtube.com/watch?v=3DeCuiN2JnjpE> >> >> Sounds like they had fun recording that one. >> >> <L> >> >> Lou Judson >> Intuitive Audio >> 415-883-2689