Assertion: tremolo | /r/ObjectUse | used on guitar
Facets:
value: out of tune
type: OTHER
value: in 1954
type: TEMPORAL
Source sentences:
text: Tremolo was first used on guitars in 1954, whereas Vibrato was first used on a guitar in 1956.
text: The problem is it is hard to keep the tremolo back in its zero position after it is being used making the guitar out of tune.