Evatone closed up shop in 2000. The article sourced here errs in stating
that the first flexidiscs were Roentgenizdat; they were a wholly unrelated
development. Evatone's soundsheets were
based on a French patent from the 50s. There is a whole range of flexible
records going back to Marconi, but a Soundsheet is something specific.


David N. Lewis
Hamilton, OH

On Tue, Apr 21, 2015 at 12:24 PM, Malcolm Rockwell <[log in to unmask]>

> 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: <>
>>> Sounds like they had fun recording that one.
>>> <L>
>>> Lou Judson
>>> Intuitive Audio
>>> 415-883-2689