Physics may be the substrate of sound, but the domain of music is action. We make music; we do so by vocalizing; we do so by hitting, banging, scraping, plucking and blowing. And the contours of musical soundscapes are shaped by what we do-by the energy, power and delicacy with which we act. Music, like speech, shoots forth from us and refl ects our energetic and embodied presence in the world.