[sdiy] Vactrol-based ring mod?

[Dan Snazelle]

well can ANYONE find the schematic for this vactrol oscillator mark mentioned? i would love to hear that THING.

thanks






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> From: pfperry at melbpc.org.au
> To: Synth-diy at dropmix.xs4all.nl
> Subject: RE: [sdiy] Vactrol-based ring mod?
> Date: Sat, 23 Aug 2008 10:40:50 +1000
> CC:
>
>
> It's certainly possible to do ring mod with a vactrol, because I have used
> an audio modulated light bulb & a cadmium sulphide photoresistor to send
> (admittedly very low grade) audio across a room, many years ago.
> So it should be a doddle, with a led!
>
> True, the LDR lags will roll off the top end pretty fast, and the
> characteristics of the LDR vary in a complex way with prior exposure - but
> in a ring modulator, most of the weirdness will cancel out.
>
> I don't think Buchla ever got the credit he deserved. He approached the
> synth problem from the "what do we need to make a musically interesting
> tool" angle, rather than a strictly engineering approach.
>
> paul perry Melbourne Australia
>
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