Assertion: tuba | /r/HasAspect | three valves
Facets:
value: almost always
type: TEMPORAL
Source sentences:
text: When these tubas have three valves, their lowest notes are, respectively, the A below the bass staff and the E below that.
text: Although sousaphones may have a more restricted range than their concert tuba counterpart (most sousaphones have 3 valves instead of 4 to reduce weight), generally they can all play the same music and usually have parts written in the bass clef and the indicated octave is played (unlike double bass or electric bass that sound an octave lower than the indicated note).
text: Most tubas will have four (or more) valves that allow it to access the lower register more easily.
text: Three-valve tubas are generally the least expensive and are almost exclusively used by amateurs, and the sousaphone (a marching version of a BB♭ tuba) almost always has three valves.
text: Most sousaphones and beginning tubas have only three valves, while a professional tuba may have four or even five valves, according to Begin Band.