F2-Ab2. Reid, John W. The Double Reed 4/3 (December 1981): 2.

x x x | x x x F
         F#-tr Ab-tr

F2-Ab2. Timm, Everett LeRoy. The Woodwinds; Performance and Instructional Techniques. Boston: Allyn and Bacon, 1964, p. 171.

x x x | x x x F
   w           Ab-tr
Home page

Heckel-System (German) Bassoon Trills and Shakes by Note Names