other guys have the same problem, i think you can find your solution in this topic
edit : but i think 6 go to center pin,
ânormal signalâ with no octave down in pin 1 (GND)
1 oct down = pin 2 (1V)
2 octave down = pin 3 (2V)
3 octave down = pin 4 (3V)
4 octave down = pin 5 (4V ref)
on the rotary : A center, and after pin 1,2,3,4,5
but i havenât buit this, maybe wait for confirmation of other guys âŚ
edit : see at 12.48â