[sdiy] presets on a modular

[Roman]

The most expensive part of my idea was to convert all pots
into something that can be digitally stored. Se there we have
pots that are pure CV generators -  DAC's enough. Then there
are attenuators, where DAC can also be used, giving 4-quadrant
multiplication as a free gift with proper DAC selected.
And there are variable resistance, like in simple envelope
generators. It might be doable with DAC, or digital pot, but
it may be better to skip those and redesign envelopes to
something more modern and only slighlty more complex.
In a typical module that would be about 8 multiplying DACs,
plus a micro to scan all pots and controll DACs, and
communicate with programmer module.
I wanted them to be at least 12-bit, and that may get pricey
at this quantity.
And then there's of course MUX (in version with buses, not
the large matrix), alowing each input/output to connect to one
of the 16 analog buses. That's a whole bunch of chips.

Roman

----- Original Message -----
From: "Paul Maddox" <P.Maddox at signal.QinetiQ.com>
To: "Synth-Diy" <synth-diy at dropmix.xs4all.nl>
Sent: Thursday, November 11, 2004 10:04 AM
Subject: Re: [sdiy] presets on a modular



> the *BIG* problem, and always will be, is that no modular synth is 100% CV
> controlable, for example on the filters, the resonance control isn't CV
> controlled, so you're kinda stuck with preseting that and things like it.
>
> I've never actually seen one of these things in real life
(synthesizers.com
> system) anyone have any comments on it?
>
> Paul
>
>