The strange thing is that the sudden decrease in pitch range is not affected by the pots that was used to tune the scale. I have two manuals called Moog Prodigy Technical Service Manual (only the few pages that explains the alignment of scale/tuning) and Moog Prodigy - Owner's Manual . But I couldn'...

By opening my Moog Prodigy, I adjusted tuning of keyboard scale. The instrument has always been out of tune, but finally it's now in tune. I did the tuning by ear, using no electronic equipment (I don't have any). I wasn't sure the whole time what I was doing. It worked out fine - BUT now I found ou...