Ab2-Bb2 (downtrill). Cooper, L. Hugh. The Double Reed 2/4 (April 1980): 27. Same as Ab2-Bb2 downtrill on Cooper p. 51.
x x x | x x o x x x | x x x w Bb w Bb
Ab2-Bb2. Christlieb, Don. Pictoral Fingerings for Bassoon. Published by author, 1966, p. 21. Cooper, L. Hugh. The Double Reed 2/4 (April 1980): 29. Timm, Everett LeRoy. The Woodwinds; Performance and Instructional Techniques. Boston: Allyn and Bacon, 1964, p. 172. Same as first Ab2-Bb2 trill on Cooper p. 36.
(Eb) x x x | x tr x Ab w (D)
Ab2-Bb2. Elliot, Thomas C. In Klimko, Ronald. Bassoon Performance Practices and Teaching in the United States and Canada. Idaho: University of Idaho, 1974, p. 65.
Eb x x x | x tr x Ab E D
Heckel-System (German) Bassoon Trills and Shakes by Note Names