Wiardgroup

I have been working with Brice of Synthmodules.com to design a 
general purpose computer module for the Frac-Rac format.

Past example of systems like this are the Buchla 300 and 
Buchla 500 series. Also the PAIA 8700 series had a general 
purpose computer. These were modular analog systems with 
the addition of a general purpose computer with analog to digital 
and digital to analog converters for arbitrary fuction generation. 
More information is at:

http://www.synthmodules.com/psim.htm

The module is a Basic Atom Pro with 4 x 10 bit A/D inputs and 4 x 
12 bit voltage outputs. Voltage ranges are 0 to 10 volts and the 
DACs are calibrated for standard scale generation in 1 volt per 
octave systems. With the 12 bit DACs and a precision reference 
which can be rescaled, you could produce a scale quantizer for 
micro-tuned scales. For a 10 volt range, the step size is 2.6 
millivolts. A single resistor change will allow the DAC reference 
to be adjusted to 3.399 volts, so the step size is 830 microvolts, 
or one cent per step.

Applications software is, of course, up to the user. But Brice has 
plans to make some "prepackaged" functions available as 
freeware.

One intersting application planned is a Voder module using a 
speech synthesizer. Tied to the PSIM-1s CV inputs, it would 
allow voltage control of voice pitch and voltage control of word or 
phrase selection.