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