[sdiy] How many sheep

[Dan Slater]

Sebastian Kuehnl wrote:

> I want to work with Shepard scales...
>
> The Buchla 264 deploys CV demultiplexion to create 4 voice polyphony with one
> oscillator - is this sort of circuit able to do the Shepard job with a
> correspondingly smaller number of module combos?

The Buchla 264 demultiplexes one control voltage into 4 via sample and holds and
a ring counter. Contrary to what you said above, you need 4 oscillators and 1
keyboard for polyphony. Would not reduce the needs for multiple oscillators in a
classic Shepard patch.


> Comdyna GP-6 can be programmed to act as VCO, VCA, VCF and more - how many of
> one of these can it do at a time?

The Comdyna GP-6 is a small analog computer that includes 4 integrators, 2
multipliers and 2 summing amplifiers and 2 inverters. One GP-6 computer could
synthesize 2 VCAs or 1 poor performance VCO or 2 simple single pole VCF or 1 VC
state variable filter -- not all at the same time. Emulating standard analog
music modules is not the strength of the Comdyna GP-6. But if you need a Ueda
Attractor or other nonstandard functions, it is the way to go.

Best regards;

Dan Slater