[sdiy] trying to understand appregiators in late 70's synths

[Florian Anwander]

Hi Dan

> In the german issue 07/08 1981 of Elektor was the schematic for a 6-Bit 
> keyboard encoder. ...
> I'll try to scan it.
Here it is:

http://fa.utfs.org/diy/elektor-matrix-keyboard.jpg

Florian