When determining the amount of polyphony when two k/boards are midi'd together, which one controls how many notes you can play at one time? For instance, if I were to purchase a Casio wk3200 and use as a master(because of its' 76 keys) and wanted to use my Tyros as a slave, how much polyphony would I have? Would it be determined by the Casio(master) or the Tyros(slave)?

Thanks in advance for any help.

Regards,
Ed