Things That 'Screw Up' a Waveform

[Grant Richter]

Dan Slater has a very nice article on this at his website. I built one based
on the LH0094 log processor to get continuous control of exponentation from
1 to 4. Sounds are interesting, especially in self oscillation where it
functions as a chaotic oscillator.

Other than that you can look at it as a filter with built in distortion.
Most interesting when processing complex signals like samples. Simple input
signals tend to be a little plain, because of the static nature of the
non-linearity, the spectrum is fixed. With any non-linear shaper, more
animated results are produced by modulating the amplitude of the input
signal, which changes the spectrum over time.

> From: Scott Gravenhorst <music.maker at gte.net>
> Reply-To: music.maker at gte.net
> Date: Wed, 03 Jan 2001 07:50:43
> To: synth-diy at node12b53.a2000.nl
> Subject: Things That 'Screw Up' a Waveform
> 
> All the talk about the bi-pulse (which looks like a very cool
> thing) got me itchy again about a state variable filter with
> nonlinear feedback.  I had last week off and of course there
> had to be a "creeping death" chest cold around, so I was laid
> low all week and couldn't do much.  But the good news (er and
> bad too) us that my job contract is up end of January and I
> will most likely be unemployed for a couple of weeks.  I want
> to take another shot at this then.
> 
> I think my project got a little too complex, I started worrying
> about bandpass and hipass outputs etc instead of just first
> making the basic thing work as a usable unit.  I had it operational,
> but all spread out on the bench.  I didn't really do alot
> of testing then because my oscope was in the process of eating it.
> But even with a malfunctioning Eico, I could see that it would
> screw up wave forms pretty well, and the ear test was also
> positive.  Now I have a brand new BK Precision scope which will
> show much more accurate waveform pictures (40+ times the bandwidth
> of the Eico)  So this time around, I'll be using the KISS method.
> I think just having the lowpass unit will be alot of fun.
> 
> -- Scott Gravenhorst : Done the Edge, Now What?
> -- Linux Rex, Linux Vobiscum  |  RedWebMail by RedStarWare
> -- FatMan: www.teklab.com/~chordman
> -- NonFatMan: members.xoom.com/_XMCM/chordman/index.html
> 
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