Just a side note to what Fran said. To develope technique
( yes thats includes dynamics ) you need a weighted board. Finger independence and speed come from playing weighted keys,
All serious organists practice piano also.
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Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer