Yes, John, I agree. I usually play a C7-9 with the G on the bottom which results in a Gdim chord as far as the KN7000 keyboard is concerned. The inversion that you use affects the bass line of the APC part with an arranger. I'm really trying to get at the proper way to interpret a 7-9 chord as it relates to a bass line. For example, if you were playing a piano, what bass notes would you play.