Assertion: tuba | /r/CapableOf | reduce weight
Facets:
Source sentences:
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).