Vivaldi, Antonio. E Minor Concerto for Bassoon, third movement, mm. 6 and 7 from the end, E4 to D#4 to E4. Öhlberger, Karl. To the World's Bassoonists 7/3 (1977): 5.

E4:
x o x | x x x

either D#4:
x o x | o o o

or D#4:
x o x | x x x
           F#

Suggested Heckel bassoon fingerings for musical passages