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The free selection of fills is a patent owned by Yamaha; that's why Roland cannot implement it (like other manufacturers cannot implement many other functions patented by Roland).
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This is great news ! :
Yamaha should send claims to Korg, Wersi, Ketron, Solton..... and all other brands, to make money of it.
O3bor : You're not serious about your statement, are you ?

You seem to know things that I would think is Roland 'inside information'.....