[sdiy] expo accuracy? or integrator accuracy?, or both?

[John L Marshall]

What is the book? Sounds like interesting reading, but only when the
girlfriend is away.


Take care,
John
www.sound-photo.com
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----- Original Message -----
From: "Magnus Danielson" <cfmd at swipnet.se>
To: <music.maker at gte.net>
Cc: <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, February 09, 2003 7:52 AM
Subject: Re: [sdiy] expo accuracy? or integrator accuracy?, or both?


> From: Scott Gravenhorst <music.maker at gte.net>
> Subject: Re: [sdiy] expo accuracy? or integrator accuracy?, or both?
> Date: Sun, 09 Feb 2003 07:11:07 -0800 (null)
>
> > Grant Richter <grichter at asapnet.net> wrote:
> > >> I've had an ASM-1 VCO measure in at a 21 octave range, but the last
part
> > >> wasn't
> > >
> > >That would be about 6 decades or 10E-9 to 10E-3 from the current
source.
> > >
> > >That should be normal for an exponential pair, but of course a current
of
> > >10E-9 can easily leak away or be absorbed by bias currents.
> > >
> > >Rather than perfecting the a "good enough" core, wouldn't it be more
> > >interesting to investigate new dynamic waveshaping designs like the
Buchla
> > >Music Easel?
> > >
> > >It seems to me the frequency stability is acceptable, but new timbral
design
> > >has barely been touched on. Timbre is arguably the next most important
> > >parameter after pitch is satisfactory.
> >
> > Hear hear!  Does "dynamic waveshaping" mean "ever changing" or in our
world,
> > voltage controlled ?  I would love to play more with this.  I've done
the
> > usual messing with VCO sync, PWM and a bit of folding, but not much
more.
> > Bifurcation, as in the Chua chaos oscillator system, looks cool, but the
Chua
> > seems too "out of control" for my use.
>
> A Chua oscillator for modulation source then?
> That would allow you to control the depth of the chaos according to your
needs.
>
> BTW, I recently got a book where Chua himself had written about non-linear
> curcuits. Sure enought, in there I even found Chua chaos oscillators! ;O)
> That was in a very serious (and for most people pretty booring) book, so I
was
> delighted to find it in there.
>
> BTW, did you people know that there are curcuit elements which behaves
like
> half-pole components? -3dB/Oct curve and all.
>
> Cheers,
> Magnus
>