In other words, no....
THIS is one of the reasons that Chord Sequencers are SO useful.
I know I sound like a stuck record, but so few of you realize just HOW useful these things are. Imagine setting up your chords on the Korg, plaporte, and then looping while you play bass.... BUT.... you can still change variations and fills WHILE IT PLAYS (foot control, anyone?)!
That would be so much more interesting to practice over than a static loop....
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An arranger is just a tool. What matters is what you build with it..!