Subject: Re: [linux-audio-dev] Moog VCF in SpiralSynthModular
From: Phil Kerr (phil_AT_plus24.com)
Date: Thu May 23 2002 - 01:32:11 EEST
Another source of code is the Bristol synthesiser emulator. It emulates a Moog
Mini, Moog Voyager and others.
http://www.slabexchange.org/index.cgi?DOWNLOAD
Cheers
Phil
Paul Kellett wrote:
> > > 1) On which papers/information/sample code is the Moog VCF in SSM
> > > based ?
> >
> > It's pinched from here: http://musicdsp.org/ (an extremely good site btw)
> > And indeed, it's apparently from the Stilson/Smith CCRMA paper and the same
> as
> > the one used in CSound. There are also a couple of variations that look
> > interesting.
>
> One of the variations is mine :) It's an interesting filter structure as
> it is so simple (4 first order lowpasses with overall feedback) but there
> are so many things you can play around with. I expect everyone who implements
> it does it slightly differently!
>
> > There is a patent on the hardware ladder vcf, but I don't know about the
> > software (erm, hope not.. :))
>
> Not as far as I know either.
>
> The original US patent is 3,475,623.
>
> Paul.
>
> _____________________________
>
> m a x i m | digital audio
>
> http://mda-vst.com
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