[sdiy] waveform animation (was Re: [sdiy] Imperfect VCO)

[john mahoney]

> wait a second. I really don't think we should give credit to Bob for
> inventing voltage controlled waveshape on an oscillator. The RSF Kobol
> and the Serge NTO had that many years ago.
>
> It is still a great feature, of course it's a bummer to lose the option
> of mixing multiple waves.

Thanks for the correction, Mark. Apparently Bob Moog didn't invent this
feature. He made some interesting comments about it in Keyboard magazine
(May 2003):

    "But the oscillators were somewhat special. One part of the Voyager's
oscillator design that's extremely advanced is that you have voltage control
of *everything*. ... now you have voltage control of the waveforms, which
you can change continuously, from triangle to sawtooth, and through every
width of rectangular, with just one voltage. ... The more things that are
voltage controlled and that you can play with your hand, the more alive the
sound is going to be."
    [snip]
    "But it's tricky. You can always design circuits that will change a
waveform in response to a changing voltage with diodes. But to do it
precisely so that each instrument is the same, and when you turn the knob,
the waveform changes smoothly through all these different shapes, that takes
a little craft. Just like someone making a fine piece of furniture."

I see that Bob does not take credit for the waveshape feature, nor does he
call it "new".
--
john