SergeModular

Wow, great, thanks! Very cool.

thornburgh73@... wrote:

>
> Done. I have two examples, one varying the resonance (generated
> by external feedback) from none to beyond self-oscillation.
> The second consists of several filter sweeps. In both there is a
> square wave input from an NTO. A square wave usually causes
> problems in filter sweeps because the first few harmonics are
> spaced quite far apart, so it's hard to maintain a constant
> amplitude when doing a sweep. What I do at the
> end of the second file is fade the oscillator input to silence. The
> amplitude of the self-oscillation stays remarkably consistent, except
> at the very end.
>
> I checked John's site again, everything seems correct. I would
> be interested if someone else would try this patch so I can
> figure out exactly what is the problem?
>
> The basic benefit of this approach is once the filter reaches
> self-oscillation you have pretty good control of the amplitude
> (headroom) of this oscillation. You can increase it gradually without
> too much distortion. actually the sound of this filter
> configuration is quite "clean" because no audio-rate distortion
> is necessary to limit the oscillation amplitude, if this makes
> sense. It's like using a compressor vs. clipping distortion,
> except applied to the feedback path.
>
> one unfortunate aspect of this filter is you can't overdrive the
> input. if the input is louder than the specified self-oscillation
> amplitude, the resonant peak disappears :( If I want distorted
> filter sounds, I use two VCFQ's in series, with some fuzz distortion
> (top wave multiplier) in between, without any external feedback.
> this is very useful but a quite different sound.
>
> My opinion on this filter business is I would much rather use
> two 2-poles even in a series configuration than use a 4-pole, because
> you get five options for the filter (lowpass, lowpass-band, bandpass,
> highpass-band, and highpass). However, I'm all for different
> filter designs, the more (high-quality) modules to choose from
> the better! I *really* wish Rex would develop wavetable and sampler
> modules (controlled by analog clock, of course.)
>
> No other processing was done to these sounds, so there's a bit of
> noise. Anyway, hope you enjoy the files.
>
> --Harvey
>
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> Keep on Patchin'!
>
>
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