Voltage Controlled Waveshape (was animation (was Re: [sdiy]Imperfect VCO)

[John Loffink]

I haven't traced out the exact circuit, but it looks like just an opamp
and transistor circuit per stage to generate the triangle functions and
an OTA circuit per stage for the amplification.

John Loffink
jloffink at austin.rr.com 

The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.com/

The Wavemakers Modular and Integrated Synthesizer Web Site
http://www.wavemakers-synth.com/

> -----Original Message-----
> From: jhaible [mailto:jhaible at debitel.net]
> Sent: Sunday, August 03, 2003 3:28 AM
> To: John Loffink; 'mark verbos'; 'synth diy'
> Subject: Re: Voltage Controlled Waveshape (was animation (was Re:
> [sdiy]Imperfect VCO)
> 
> > I believe Wavemakers was the first to interpolate between VCO
waveforms,
> > in the 652 Dual Voice Subsystem:
> > http://www.wavemakers-synth.com/652pg1.html, in 1980. In Wavemakers
> > parlance this was a "lap circuit," short for overlap, much like the
J.
> > Haible scanner circuit.  This was used earlier in the Wavemakers
Triple
> > Bandpass Filter: http://www.wavemakers-synth.com/308pg1.html, mid
1970s
> > time period.
> 
> Nice stuff! Any idea (schemos) how they did it? Show me my
(unconscious)
> roots! (;->)
> 
> JH.
>