I have an acoustic guitar

I want to put a pickup on it & feed into a midi arranger

I want to the midi arranger to back my guitar playing
with for example
bass / drum / other sounds

Would you know What do i need.

Anybody ideas?

someone mentioned gem wk2 midi
I'm confused by everything in your post.
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NakedInTheRain aka "Naked with shriveled pencil sized bacon In The Rain"
Wait so you want a MIDI pickup? Popular ones are the Graphtech ghost system, though I have no idea if there's an acoustic version, and the Roland one, I think it's called a GP-8, again I don't know if it'd work with acoustic, just things to research.