Bachus is absolutely correct,

but it is obvious (and disappointing) the few monopolizing companies controling this small market do not see a vested interest in breaking these glorified boomboxes down into smaller, lighter, faster, expandable, integrated, compatable components that allow the user to pick and choose the desired features.

IMHO the only difference between a computer and an arranger is a piano keyboard or a querty.

best wishes all,
razoo

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Korg M3, PSR 280,
and other stuff I don't know how to use;)