51.88This prepares us for full-style transformations

When we eventually take “The Bare Necessities” or “Mack the Knife” through multiple versions, the goal will not be:

slap a different accompaniment pattern underneath.

We'll ask:

What defines this new musical world?

Then systematically change the necessary parameters while preserving enough of the song's identity that it remains unmistakably itself.

That is real arranging.