Assertion: vibraphone's bar | /r/HasAspect | resonating tube
Facets:
value: to produce a vibrato effect
type: PURPOSE
value: underneath the bar
type: LOCATION
Source sentences:
text: Each bar of the vibraphone has a resonating tube underneath the bar that amplifies the sound.
text: They may be similar to look at, but vibraphone uses aluminum metal bars wherein each bars also has a resonator tube and a butterfly valve at its upper end to produce a vibrato effect.