If I want to change the drum track on my Roland from a rock kit to a brush kit, it takes a few button presses. If I want to do the same on a Ketron, I have to search for EXACTLY the same beat, played on a different kit? Get real, for Pete's sake..!

Plus, let's be real here... most loop libraries are not based around the needs of an arranger player. And, pray tell me, how do I deal with the intros and outros. I bet you've got a good suggestion for how I replace those rock intros with brushes, don't you? No?

This is a VERY common scenario... you turn up to a low volume/energy gig, someone wants to hear some Springsteen, or a Clapton tune, you have the perfect style for it IF you were at high energy levels. With an Audya, you say 'sorry'. With a MIDI arranger, you change the kit to brushes, the bass and guitars to acoustic, and everyone is happy.
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An arranger is just a tool. What matters is what you build with it..!