Save yourself the obvious disappointment and just buy a used MicroArranger. These EK models are literally stripped down versions of it (majorly stripped down too). The MicroArranger is a much more capable arranger with many features not found on the BK line.
Sqk
............ but it would be better to get a used Korg PA50sd which is identical to the KMA and has the added advantage of normal sized keys and a pretty decent internal amplificiation and speakers.....
regards
John