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

[Grant Richter]

> 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.