Hi DNJ

Have a look at most decent organs and you will find they have a minimum of 256 notes so that they don’t get notes dropping out when playing.

Arrangers with their limitation of a single keyboard are not as critical as you are limited to the amount you can play, but as soon as you start sequencing (To fill in the gaps) it can soon gobble up all the available polyphony. (8 track Midi sequence with 4 note chords (Plus basic single layer voices) means 32 notes have already gone out the Window, plus if there are any sustaining voices you have to allow extra (Say 40 notes) to cover it)

Multiple layered samples also eat up polyphony as each layer requires its own note.

Bill