Question

What does it mean to arrange a piece of music? (keep in mind we are talking about writing here)

Answer 1

Answer:

In music, an arrangement is a musical reconceptualization of a previously composed work.

Answer 2

Answer:

Music arranging refers to the ability to orchestrate and re-work an existing piece of music

Explanation:

More...

Arranging music with new or different chords, rhythms, chord substitutions, grooves, instrumentation, etc. It’s basically an extension of the skill of music composition.