Thanks, Rikki...
Professional or not, there are few who can record an entire part without making even ONE tiny mistake. And lack of event editing and controller editing makes ANYTHING a PITA. As does having to transfer to a computer (and having to buy a PC if you are a Mac user) to be able to do any detail work.
I've got a bunch of EMC conversions. And let me tell you, from controller issues to wrong chords (sometimes, 7th and 6th play fine, but simple major comes out as minor!), without event editing they are unusable. With event editing, they are often fine.
Treat an arranger as a ROM only preset machine, all is good. But if you like to assemble, create or edit styles, these tools are absolutely indispensable.
So.... any comment from the ex Ketron and Roland dealer?
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An arranger is just a tool. What matters is what you build with it..!