The writing is on the wall. The first keyboard manufacture (Roland, Yamaha, Korg, etc.) or Dell to come out with an open architecture will be the dominant player from that point on. The keyboard makers are doomed if they do and doomed if they don't. If they bring out an open system keyboard, then it isn't necessary to buy a new keyboard to get new styles, new sounds, etc. If they don't then I, for one, will build it myself, and they still lose.
Starkeeper
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I play Roland EM20 and Yamaha PSR550