Playing a musical instrument is a technical craft. Expressing music, by contrast, has been viewed as an art, a view held so long that it is rarely questioned. An alternate view, presented in this essay, is that expressing music is also a craft: it is the craft of musical communication, the art of delivery. It is possible to master technical skills while lacking in communicative skills, and vice versa, because these skills have very little to do with each other. Today, musical mastery is often measured by the former skills, not the latter, yet the greatest musicians are those who are highly skilled in both crafts.