Assertion: tuba's valve | /r/AtLocation | use
Facets:
Source sentences:
text: For a valved brass instrument like the euphonium, this means that when no valves are in use the instrument will produce partials of the B♭ harmonic series.
text: The baritone is pitched in concert B♭, meaning that when no valves are in use the instrument will produce partials of the B♭ harmonic series.