AW: Re: [AH] building an analog keyboard controller for a

[Ullrich Peter]

Hallo Juergen!

>This thread brings up unpleasant memories. The first "synthesizer" circuit
>I've seen in my life was the "Plastik Sound" article in a (probably long
>defunct) German electronics magazine called "ELO".
>What did they do ? Used a cheap and dirty CD4046 PLL chip for the
>VCO, which is "almost" linear (V/Hz), but just almost. Then they built
>a keyboard with a series string of trimpots for tuning each note
>individually.

Interesting! This was my second synthsizer I have built (for a friend).
I had not such big problems - this synth worked well.
The intersting part was that the waveform of the produced sound could be 
set by 16 sliders (potentiometers). So quite different sounds could be produced!
But there was no special filtering and no envelope as far as I remember.
But I still have the schematics of this beast anywhere in my house...

Ciao
Peter

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