Assertion: oboe's key | /r/ObjectUse | used for e♭
Facets:
Source sentences:
text: The upper key is used for E♭ 2 , E 4 , F 4 , F♯ 4 , A 4 , B♭ 4 , B 4 , C 5 , C♯ 5 , and D 5 ; it flattens G 3 and is the standard fingering for it in many places that tune to lower Hertz levels such as A440.