[78-L] Record playing speed

[Bertrand CHAUMELLE]

Don't forget the 8 1/3 rpm record (for the blind). From 1956 (first 
experiments by Peter Goldmark) well into the '80's.

The first 3-speed phonograph (8 / 16 / 33) with a speed-variator, the 
'AE1' was made in 1965 (National Library Service for the Blind).

AES gave a demo of 4 rpm around that time.

BC

Le 3 déc. 08, à 18:59, Michael Shoshani a écrit :

>
> On Wed, 2008-12-03 at 12:48 -0500, Michael Biel wrote:
>>> David Lennick wrote:
>>>
>>>> Yup..24 RPM. I have several discs at this speed.
>>>> dl
>>>>
>> Which reminds me of ANOTHER standard!  Theodore Edison was developing 
>> an
>> extra long playing disc in 1927-29 for broadcasting use that ran at 30
>> RPM.   Each rotation was exactly 2 seconds. It was threaded at 300 per
>> inch.  Each minute  was 1/10 - inch.  Ten minutes per geooving inch.
>> The arms would have a micrometer dial to allow cueing by time.  He 
>> also
>> experimented with slower speeds of 16 and 12 RPM.  I think the August
>> 12, 1927 phonograph anniversary broadcast was recorded at that speed.
>
>
> I don't have my Frow book here at work so I can't confirm this, but if 
> I
> recall correctly the 30 RPM broadcasting equipment was sold as
> "Rayedisonic" or some such. A portmentau of "radio" and "Edisonic".
>
> There was also the Selectatune idea which I don't believe ever got off
> the ground; this was to be a 10 or 12 inch record with multiple tracks,
> playing either at 24 or 30 RPM (I forget which), but which would pretty
> much function as a jukebox. Except with only Edison material, of
> course. :)
>
> Edison did apparently implement one or two talking vending machines 
> with
> very small records that played at 24 RPM. There was a choice of four
> messages, each one just under two seconds. Frow's examples seem to be
> for cigarette sales judging from the slogans used - "Thank you, it's
> toasted" (Lucky Strike) and "Thank you, Mild as May" (Marlboro, back
> when it was marketed as a woman's cigarette with ivory tips and red
> paper).
>
> Someday we'll all have our book libraries on easily-accessible
> centrally-stored databases, and can look these things up whenever we
> want, wherever we are...
>
> MS/LFT
>
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