> 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

The rectangles are available as the port outputs RB1...RB4 (pins 22...25) of
the microcontroller. If you want to use these at outputs you have to insert
protection resistors (~1k) between the corresponding pin and the sockets.
Otherwise the microcontroller may be damaged when a plug is inserted into
the socket (because of the short circuit that is generated for a short time
when the plug is inserted).

Best wishes
Dieter Doepfer