[sdiy] Anadigm again

[jhaible at debitel.net]

> Of course, the downside is the switched cap design.

That's downside #1.

Downside #2 is the CMOS process - no BJTs with their
inherent expo function which is the basis of many "traditional"
synth designs.

I have no doubt that you can produce a lot of interesting noises
with this - all that with quick system level programming and
no analogue knowledge. But a Moog on chip - hardly.

I can see how it looks intersting for software people, to just
program something and get "real analogue" instead of VA.
But it's still a time discrete ("sampled") signal processing.

JH.







> 
> Eventually I started thinking about implementing a VCO or VCF.  I got the
> impression that any circuit realization you get is static (that is, not
> voltage controllable) for analog synth purposes.  There *is* a multiplier
> block but I think it's just a block implemented with an 8 bit lookup table
> and probably not suitable for applications requiring fine control via some
> control parameter.
> 
> At NAMM, Anadigm showed an analog synth using Anadigm parts.  The press
> release says that their oscillators are controllable over a 7 octave range
> (good but how accurate? didn't say).  They also say it's controllable using
> software LFOs and ADSRs.  What they didn't say is if it's controllable using
> external voltages.  We all know how accurate we need VCO control voltages.  I
> wonder if the Anadigm chips aren't capable of this kind of accurate control.
> 
> Read all about the synth at http://www.anadigm.com/prs_05_a.asp?prid=34.  You
> can get the dev tool for free from Anadigm.  If you have the eval board, you
> can test your results.  Designing is not restricted if you don't have the
> board.
> 
> Does anyone know how the Anadigm synth was implemented?  How good is it for
> performance purposes (is the synth a toy or is it better)?
> 
> John Speth
> 
> 
> 




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