cheers dieter.

i'll have to do a little research to find out what some of that means, particularly the multivibrator, but that's part of the fun.

anyway, the a113 is a great module. the tones available by using the upside down harmonic series are really worth having.

is there somewhere on the pcb where one could tap the square waves before they get sawtoothed i'm putting a rack together based around the a113 and the a107, and the extra waveform would be a useful extension. or so i assume, it's early days yet :)

thanks,

stu

>
> A capacitor is charged by a voltage controlled current source (VCCS) and
> reset by the falling edge of the rectangle. The control voltage of the VCCS
> is generated by a simple frequency-to-voltage converter (nothing but a
> one-shot multivibrator triggered by the rectangle and a passive low pass
> filter). Far away from beeing a perfect sawtooth (same as the original
> Trautonium) but the right choice for this application.
>
> Best wishes
> Dieter Doepfer
>