Casio Rapman RP-1 pitch shifting question

[jeromy]

so this is a mad little toy but the vocal processor is bonkers. The "harmonies" on my version are 6ths! Anyone know a way to pull those down to a more useful 5th? If that's possible I think I would use this thing on every single project i ever do.

[scorpiistar]

the chip in question is an OKI msm6322 google for the datasheet

the rapman uses only a few preset levels

you can rewire it to step thru 17 levels using two pushbuttons