Linear VCF

[Romeo Fahl]

This is one of my all time favorite filters.  Before this the MS20 was my
fave, but this one has a nice electric 'bite' to it that I've not heard in
any other filter.  Using CMOS buffers was an ingenious idea.  My hat's off
to Juergen for making the design accessible to us DIYers.

Romeo



----- Original Message -----
From: "René Schmitz" <uzs159 at uni-bonn.de>
To: "Synth DIY" <synth-diy at node12b53.a2000.nl>
Sent: Thursday, June 22, 2000 5:05 PM
Subject: Re: Linear VCF


>
> Its kind of funny why we care to include linear FM on VCOs but not on
VCFs.
> So far all I've built didn't have it. With the exeption of the WASP clone,
> which only has linear. I like it for that reason: the time for travelling
> between the harmonics of the signal is evenly distributed with an
> exponential decay.
>
> Bye,
>  René
>
> At 22:32 22.06.00 +0100, Tony Allgood wrote:
> >Hi all,
> >
> >All this talk of expo inputs on LFOs reminds me to say that I have been
> >chuffed to bits with the linear modulation inputs on my new filters. Do
> >try it on your own designs if you can.
> >
> >We have all got used to the 'double' expo effect on VCFs when sweeping
> >the VCF with a standard ADSR. Since our EGs are exponential, in most
> >cases, most of us use linear VCAs. Expo VCAs are used when we want a
> >really percussive sort of thing. But our VCFs are almost invariably expo
> >anyway. So we will always get a 'percussive' sweep. Using the linear
> >input seems to result in more natural decays, softer sounds even if the
> >sweep amplitude is big.
> >
> >
> >Regards,
> >
> >Tony Allgood  Penrith, Cumbria, UK
> >
> >Modular synth circuits, TB303 clone and Filter Rack
> >
> >http://www.techrepairs.freeserve.co.uk/projects.htm
> >
> >
> >
> >
> >
> --
> uzs159 at uni-bonn.de
> http://www.uni-bonn.de/~uzs159
>
>
>