if your old keyboard outputs the individual notes of the styles through midi on defined channels you can record X measures of a style in Cmajor to either Cakewalk or to the 6500 sequencer directly and then do a sequencer to composer copy to create a new technics format style. This is relatively simple, though time consuming.

This would need to be in gm format to get the right drum map, otherwise the drums may be wrong if the other keyboard has some non-standard arrangement for the drum/key assignments.

For the sequencer to composer copy function to work you must use measures in Cmajor, exactly as if writing a new composer from scratch. There is a transpose function in the copy page that makes this easy if the midi file measures are in a different key.

However the measures must have a constant chord - if you have a chord change in the midi file within the measures you are using, obviously the apc will not work because the calculation of the left hand playing is not being done from the required base information ie Cmajor.

If you don't have 4 measures in a constant chord to use, use 2 or 1, and copy and paste them into 4 measures and then edit some changes to give a less repetitive style. I show how to do this in the book with several practical examples.