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

[Scott Gravenhorst]

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.


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