Music arranging is a science, and art, and an ability to stand back and respect the composer when the composer wants something different. Or: “Those are arrangement decisions, looking at how the song feels, looking at what key it’s in and looking at the what we call the routine of the song, you know, is it three courses, is it two courses? Do you end the song with a big bang for applause, or do you melt away and disintegrate a little bit to a quiet whisper? Those kinds of decisions are what arranging truly is.” – Slate