Assertion: beating reed | /r/CapableOf | beat against a cushion of air
Facets:
value: on the surface of the mouthpiece
type: LOCATION
Source sentences:
text: (To be accurate, rather than literally beating against the mouthpiece, or against the other half of the reed, beating reeds actually beat against a cushion of air on the surface of the mouthpiece or between the two halves of a double reed, but let's not complicate matters too much here.)