D#4-E4. Christlieb, Don. Pictoral Fingerings for Bassoon. Published by author, 1966, p. 25.
Eb x x o | x x x Ab-tr Eb x tr o | x x Eb x x x | x x tr Eb tr x o | x x x
D#4-E4 (downtrill). Durran, Daryl and Orr, Bruce. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 69.
x o x | x x x F#-tr
D#4-E4. Timm, Everett LeRoy. The Woodwinds; Performance and Instructional Techniques. Boston: Allyn and Bacon, 1964, p. 175.
Eb x tr o | x x x Eb tr x o | x x x
"Produces a very flat E":
x x o | x x x Bb-tr
Heckel-System (German) Bassoon Trills and Shakes by Note Names