Assertion: drum's pitch | /r/HasProperty | different
Facets:
Source sentences:
text: They are usually played in pairs, with the two drums tuned to different pitches.
text: Movement around the drums allows tenors to function as melodic percussion, as each drum has a different pitch.
text: If the head is not clear, the pitch will rise or fall after the initial impact of a stroke, and the drum will produce different pitches at different dynamic levels.