Roland made an even bigger blunder... They made a wireless dongle for the BK series, but the only place it could plug into the keyboard was the slot you HAD to use to load your Performances, SMF's and User Styles, etc.!
And with Roland's reading everything directly from the USB stick (no internal memory to load
data into) that basically meant it was utterly useless. Well played, Roland!
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An arranger is just a tool. What matters is what you build with it..!