SV: Re: SV: Re: [sdiy] Much progress on Buchla waveshaper analysis

[karl dalen]

--- Grant Richter <grichter at asapnet.net> skrev:

> According to Buchlas original literature, the non-linear wavefolder  
> produces the net
> effect of dynamic depth linear FM with tracking oscillators of equal  
> frequency.

Listening to some old example sound files
of the folder, it do sounds like that.
 
> (maybe they have to be thru zero VCOs though?)

Yes.
 
> The dual oscillator version gets a lot more "whack" though when the  
> oscillator calibration drifts a tiny bit.
> Very organic sounds of dying Martian Whales (or Wails).

Dying Whales? How does that sound? Harpooned!
 
> You can make a great Indian tambura like drone with that wavefolder.
> Just tune the oscillator low and slowly cycle the input depth (maybe  
> between 50 and 70%) into a medium reverb.

Good idea!
 
> The non-linear transform for the Serge version of the >wavefolder is  stored
in the Blacet Mini-Wave at Bank 13 Wave 9 >of the factory ROM.
> Just take a sine or triangle through a VCA or attenuator and vary the  
> amplitude into the Mini-Wave input while monitoring the output.
> The Mini-Wave should be set to +/- 5 volts.
> All the rest of the Serge wavefolder NLTs are stored in the rest of  
> Bank 13 including 12 interpolations between the 4 original curves (16  
> in all).
> 
> Oscilloscope photos of the Serge non-linear transform curves are at
> 
> http://www.musicsynthesizer.com/Circuitry/nlt.htm

Was'nt that actually a Wiard module!?
And you can do your own transforms with his software.
http://www.wiard.com/support/wave256.zip

KD