Assertion: trombone's trigger | /r/CapableOf | lower fundamental pitch
Facets:
value: by a perfect fourth
type: OTHER
Source sentences:
text: Trombones with a trigger are said to be in the key of Bb/F because the trigger lowers the fundamental pitch by a perfect fourth.
text: Trombones with a trigger are said to be in the key of Bb/F because the trigger lowers the fundamental pitch by a perfect fourth.