I recently got some great info from a player on the Facebook Arranger page on how to connect my BK9 to my Ipad. I tap a song on the IPAD and the correct registration comes up on the BK9. I love it.
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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