AJ the ketron sd9 pro specs say true 128 voice polyphony..
>>>AJ:- Correct.
And 64 parts multitimbral(being able to play 64 instruments at the same time, korg pa4x is 16, Genos and T5 is 32)..
>>>AJ:- Correct

Is that a lie? Since we are now confirming there is only 64 voices of Polyphony?
>>>AJ:- I used 64 just in general and was not referencing any particular unit. The SD9 Pro's polyphony is 128 (SD7/SD40/SD80 are 64).

Also don’t forget that in korg and yamaha synthesis, often other samples in a sound are used instead as at the same time.. altough some sounds indeed can really really drain polyphony.. like the hammond organ on tyros5 that indeed uses up to 8 polyphony for every note played depending on how many drawbars are out...
>>>AJ:- With KETRON, the sounds that drain polyphony the most are STRINGS!