Re: vocal transformation in early film

Subject: Re: vocal transformation in early film
From: Kevin Austin (
Date: Sun Nov 20 2005 - 17:40:38 EST

Vocoder history ...

The voice as spectrum.

Invention of Vocoder (1928): Dudley

In the mid-1930s, work on speech and hearing was expanded to include
analysis and synthesis techniques for speech transmission. Initial
efforts culminated in the development of a speech analyzer called
"vocoder" and an electrical speech synthesizer, named "voder," and
led to the concepts of formant coding for speech transmission over
reduced bandwidth.

Vocoder :In conceiving the vocoder, Dudley recognized the carrier
nature of speech. He observed that the speech signal is formed by
modulating (with the slowly changing vocal resonances) the spectral
shape of the sound produced by vocal sources. The vocal sound sources
may be periodic, as produced by vocal cord vibration, or aperiodic,
as produced by turbulent airflow at a constriction.



At 16:39 -0500 2005/11/20, David Mooney/Maxine Heller wrote:
>Sparky was definitely vocoding. I had the 78s until recently. Sparky
>has conversations with instruments of the orchestra in fine vocoding
>style. Perhaps an influence for Iron Butterfly's talking guitar on
>the Metamorphosis album?
>At 05:24 PM 11/18/2005, you wrote:
>>Richard Wentk wrote:
>>>Don't forget the inevitable:
>>This is hilarious! I have never heard of Sparky and his piano and
>>train, nor the sonovox. But is the sonovox really electronically
>>synthesized sound? The two clips from the Sparky link you sent
>>sounds a little like vocoding, and the blurb from the link seems to
>>think so:
>David Mooney:
>Maxine Heller:
>Opaque Melodies:

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