AW: Korg MS 20 f->Volt Converter

[Haible Juergen]

> this idea is built into the electro-harmonix guitar/bass microsynth.  it
> contains
> two comparators that look for pos/neg absolute peaks respectively.  these
> comparators drive a s/r flip-flop giving a nice square-wave output ( but
> not
> necessarily 50/50 duty cycles ). 
> 
Sounds familiar. The EMS HIFLI used such a circuit for the sub octave
generator.
No CV here, but getting a square wave at the fundamental is the main
challenge
after all.

JH.