[sdiy] Re: [AH] origin/s of osc sync/sync sweep

[Mike]

The Electronics Associates TR 48 analogue computer I did some restoration
on, (I donated it to the Bletchley Park Museum when I moved house), had
integrator switching, and stepping which was a form of synchronisation. This
'stepped' all the integrators together at preset time intervals, and allowed
resets. There was a 'hold' button too. I think the compute times varied from
10's of milliseconds to seconds.

There is a picture of the 'compute control' panel here:
http://www.earlycomputers.com/cgi-bin/image-show1.cgi?33

and the full article/page here
http://www.earlycomputers.com/cgi-bin/item-report-main.cgi?20050803

This isn't the one I had - that's in the UK. The patching idea was cool too.
There were a batch of fancy front panels that you could pre-wire that were
then motor-locked into place. The big centre off rocker switch on the
control panel did that.

This event at the museum might be of interest:
http://www.tnmoc.org/36/section.aspx/61

Sadly, they didn't use the TR-48, though I reckon I could have got some good
dynmaical systems patches on it for synth work, But I gave it away in 2002,
before  my re-awakewned interest in analogue synths.

||\/||ike



From: "Donald Tillman"

>
> I believe that the first commercial synth with sync was the ARP
> Odyessey.
>
> Edgar Winter's Frankenstein is probably the first recording featuring
> VCO sync.
>
> All the old-style televisions (50's, 60's) used sync in their
> horizontal and vertical oscillators, as did old style oscilloscopes
> for their sweep oscillators.  And early FM radio stereo demodulation
> circuits.  I don't think sync was ever an actual feature of analog
> computers.
>
>   -- Don
>
> -- 
> Don Tillman
> Palo Alto, California
> don at till.com
> http://www.till.com
>
>
>    > Date: Mon, 23 Mar 2009 09:33:07 +0000
>    > From: cheater cheater <cheater00 at gmail.com>
>    >
>    > I can bet you that sync existed in analogue computers before the
moog.
>    >
>    > On Mon, Mar 23, 2009 at 5:11 AM, John P <johnp299792 at ameritech.net>
wrote:
>    > > I would bet that the Moog 921 is the first oscillator to feature
sync.
>    > > The ARP 2500's 1004 T/P and 1023 oscillators didn't have it, nor
did
>    > > Buchla's oscillators of that period.
>    > >
>    > > Andrew Scheidler wrote:
>    > >>
>    > >> Don't know about the history part, but the sync sweep in "Neon
Lights"
>    > >> from
>    > >> Man Machine (Kraftwerk) is probably my favorite :)
>    > >>
>    > >> Drew
>    > >>
>    > >> On Sun, Mar 22, 2009 at 6:23 AM, Norman Fay <vietgrove at gmail.com>
wrote:
>    > >>
>    > >>
>    > >>>
>    > >>> One for the historians on the list:
>    > >>>
>    > >>> What was the first electronic instrument to include oscillator
sync?
>    > >>>
>    > >>> What is the earliest recorded instance of the sync sweep sound?
>    > >>>
>    > >>> Have at it...
>    > >>>
>    > >>>
>    > >>
>    > >>
>    > >
>    > >
>    >
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