Heckel F#4-G#4

F#4-G#4. Christlieb, Don. Pictoral Fingerings for Bassoon. Published by author, 1966, p. 27.

    Eb
o x x | tr tr o
       Bb

Alternate R. H. A hole and F key trill:

    Eb
o x x | x tr o F-tr
       Bb

F#4-G#4. Timm, Everett LeRoy. The Woodwinds; Performance and Instructional Techniques. Boston: Allyn and Bacon, 1964, p. 176.

    Eb
o x x | tr tr o

    Eb
o x x | tr tr o
       Bb

    Eb
o x x | tr tr tr F