E4. Cooper, L. Hugh. "Bassoon Clinic Series, Part Four," Etude: the Music Magazine 47/6 (June 1949): 356.
(Eb) x o x | x x x
E4. Corey, Gerald E. "How to Improve Your Tuning on the Bassoon." The Journal of the International Double Reed Society 8 (1980): 32. Polonchak, Richard M. "What Directors Should Know about Bassoonists in the Band." The Instrumentalist 30/9 (April 1976): 26. Cooper p. 203.
Eb x o x | x x x
E4. Corey, Gerald E. "How to Improve Your Tuning on the Bassoon." The Journal of the International Double Reed Society 8 (1980): 32.
"This fingering is excellent, but sometimes breaks on attacks":
Eb x o x | x x x c#
"This is beautifully in tune and is used by many famed players. It has the disadvantage in being brighter and more metallic in tone color than surrounding notes, but this can be compensated for by reed trim and embouchure adjustment":
x o x | x x x
E4. Davenport, Francesca. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 60. Add low C and D keys to stabilize.
E4. Ewell, Terry B. (27 August 1994). Cooper p. 205 with the Eb key. For technically difficult passages.
Eb x o o | o o o
E4. Groeling, Charles R. "Cultivating Bassoonists." The Instrumentalist 47/1 (August 1992): 50. Corey, Gerald E. "How to Improve Your Tuning on the Bassoon." The Journal of the International Double Reed Society 8 (1980): 32. Cooper p. 204.
Eb x o x | o x x
E4. Karr, Matt. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993 , p. 77. Cooper p. 205 without the L. H. Eb key.
x o o | o o o
E4. Moritz, Frederick. "A Dissertation on the Use of Alternate Fingerings for Some of the High Register Notes on the Heckel and Heckel-Type Bassoons." The Double Reed 8/3 (Winter 1985): 30.
Eb x o x | o o x
E4. Spittel, Richard. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 57.
Db x o x | x x x
E4. Swanson, Robert. "Pictorial Bassoon Fingerings." Woodwind Magazine 4/1 (September 1951): 9.
Optional flick of L. H. thumb C# key:
x o x | o x x (c#-flick)
Cover either E or D hole:
(x)(x)o | x x x o x x |(x)x x Ab