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

[mark verbos]

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.

mark

john mahoney wrote:

>>Producing waveform animation by the use of non-linearities (which are
>>computed in the time domain) has been explored much less.
>>    
>>
>
>Although they do not use computer-generated non-linearities, the Minimoog
>Voyager's VCOs have the cool wave controls. To quote:
>    WAVE controls (3) provide continuous control over the waveforms of the
>    oscillators, from triangular, to sawtooth, to square, to narrow
>rectangular.
>
>There are a lot of wave shapes in between, say, a triangle and a sawtooth.
>Varying the wave shape dynamically would be more interesting. I assume (?)
>the Voyager's waveshapes can be modulated dynamically by LFOs or envelopes.
>
>Funny thing: This shaping is easy for a digital synth, but I haven't seen it
>done before. Leave it to Bob Moog to make it happen on an analog synth.
>
>This technique could use a name. We have PWM for pulse width mod, this is
>something like ramp slope modulation (RSM) or wave shape modulation (WSM).
>--
>john
>
>
>  
>