Assertion: percussion instrument's pitch | /r/HasProperty | changed
Facets:
value: by rotating the drum
type: MANNER
Source sentences:
text: The pitch of the sound is changed when the player opens or closes the various holes in its body.
text: A rare tuning mechanism allows the pitch to be changed by rotating the drum itself.
text: There are many ways that the pitches can be changed, depending on how the hand above the small upper hole is positioned.