Diaphragm: a sheet of muscles that separates the stomach and abdominal region from the thorax; it is used in inflating and deflating the lungs.
Dissonance: inharmonious, harsh sound (the sound of your cat stuck in the couch)
Dynamics: the variation and gradation in the volume of musical sound
Encore: if you're really good, they'll scream this at you; it means "more"
Etude: a musical composition intended mainly for the practice of technique
Falsetto: an artificially high-pitched voice, esp. in a man (as perfected by Michael Jackson or Justin Timberlake)
