Assertion: drum's pitch | /r/HasProperty | changed
Facets:
value: by rotating the drum
type: MANNER
value: during a single beat
type: TEMPORAL
Source sentences:
text: The waist of the drum is held between the player's arm and ribs, so that when squeezed the drumhead is tightened, producing a higher note than when it's in its relaxed state; the pitch can be changed during a single beat, producing a warbling note.
text: There are many ways that the pitches can be changed, depending on how the hand above the small upper hole is positioned.
text: A rare tuning mechanism allows the pitch to be changed by rotating the drum itself.
text: The pitch can be changed by adjusting the tightness of this second rope.