Simplified real styles and real tracks that would help musicians in the woodshed.

For example a bass player that ALWAYS plays the root on beat 1.
or 1,5,1,5 on every measure of a 4 beat bar.
A simple walking bass that always hits the 1 on the chord change
I'm sure other ideas come to mind

Drummers that play very straight rhythms and grooves.
Here's what a very bossa nova sounds like.
Or shuffle

Keyboard that provide basic shell chords.

Something even simpler than checking the "simple" box
A separate Genre of styles if you will.

These may not go into a performance arrangement but could be helpful to musicians trying to practice their craft.

A drummer trying to lock in with the bass player. A bass player trying to lock in with a drummer. A guitar player trying to play over the changes. Hearing the root every time the chord changes can be great help when learning to improvise a new tune.

Possibly some of these already exist. Finding them in the thousands of style and real track options can be difficult.

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