Discussion about the Korg PolySix synthesizer

Do you know if the specs of the sound of the tape interface is 
available somewhere?

I will like to build a patch editor for my Polysix (easy task), to 
group patches in set of 32 (easy too) and to self generate the wav 
for that bank (not so easy).

So, what I need to know is the base sound (shape and frequency) and 
its modulation related to values encoding.

Thanks a lot for any help.

Riccardo