VC delay module ideas?

[Jim Johnson]

Check out some of the stuff at Midwest Analog Products. I bought the last
two of their VC Analog Delay kits; I guess Tom Henry has designed several
of these and I think even sells a schematic in one of his books. I haven't
built mine yet; I'm procrastinating until I can find a circuit for a decent
exponential convertor for the CV input. That's the one flaw I can find in
his design: because the clock has a linear response, it will not give a
natural sweep sound, which is why people have to create these kludgy
hypertriangular LFOs to drive them. (Flames invited!!)

I think Anders Sponton also has a schematic for one on his site. The
problem with most analog delay schemos I've seen is that they are designed
for use with guitars, not as synth modules.



*********** REPLY SEPARATOR ***********

On 10/29/98, at 9:29 AM, John Speth wrote: 

>I'm thinking of designing and building a CV controlled analog delay module
>using one of those Panasonic delay lines as the core delay device.  Does
>anybody have any good ideas for features something like should have?
>Naturally, my first thoughts were to make the clock circuit voltage
>controllable.  And maybe a voltage controlled wet/dry mixer on the output.
>
>Are there any useful schematics anywhere for such a design?
>
>If you've ever played with these, you're probably aware of how radical
they
>sound when they're clocked at audio frequencies (aliasing) so I'm thinking
a
>low stage count would be best.
>
>John Speth
>Object Engineering, Inc
>mailto:johns at oei.com

Jim Johnson 
Metaphoric Software
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