"Idamchap used to say that you can't make sound on a jew's harp whose tongue is broken. What he meant was that in order to produce the overtones, you first have to be able to produce the fundamental drone. Both come from the same source, unlike, for example, the bagpipes, where the drone is produced by one pipes and the melody notes by another; or the kind of drone that's used in may forms of vocal polyphony, where one singer of group of singers holds the drone while another sings the melody. "Westerners who listen to drone-overtone instruments like the jew's harp, or to throat-singing, often ignore the drone and focus only on the melody. But for Tuvan listeners, drone and overtones form an inseparable whole, and the timbre of the drone is crucial to producing a harmonically rich sound that extends over a wide frequency range. When yo are in this kind of sound space, you hear not only overtones but undertones- you can hear sound at all audible frequencies (3) If you're the sound-maker, you can use these sonic resources to imitate or represent whatever kind of sound you want. All registers and pitch heights are theoretically available. The limits to what you can hear and reproduce are physical, not conceptual."