C#3. Arbiter, Eric. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 71. Peeples, Georgia. "Playing Pianissimo: Mute Fingerings for the Bassoon." NACWPI Journal 62/2 (Winter 1993-1994): 15. Polonchak, Richard M. "What Directors Should Know about Bassoonist in the Band." The Instrumentalist 30/9 (April 1976): 26.

x x x | o o o
  c# w   E
    D

C#3. Ewell, Terry B. (02 Sept. 1994). For a rapid slur from C#3 to C#4 in a passage with the whisper key lock set:

C#3 (Cooper p. 72):     C#4:
       c#                      c#
x x x | o o o           x x x | o o o
  wlock                   wlock

For rapid slurs in both directions:

C#3:                    C#4:  
x  x  x  | o o o        x x x | o x x F
  c# wlock                wlock
    D

C#3. Hardisty, Donald M. "Tuning those Bassoons: Part II--Tuning Individual Notes and Reisters." The Instrumentalist 36/8 (March 1982): 72. Cooper p. 71.

x x x | o o o
 c# w

C#3. McAuliffe, Joseph. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 64. Add one or more of the following to stabilize pitch: L. H. D key or Eb key or Db key. R. H. F key or Ab key (little finger or thumb) or little finger F# key.

C#3. Swanson, Robert. "Pictorial Bassoon Fingerings." Woodwind Magazine 3/9 (May 1951): 5.

       c#
x x x | o o o
   w   Bb
   (D)

C#3. Swanson, Robert. "Pictorial Bassoon Fingerings." Woodwind Magazine 3/9 (May 1951): 5.

    Eb
x x x | o o o F
  c# w   E
   (D)

C#3. Swanson, Robert. "Pictorial Bassoon Fingerings." Woodwind Magazine 3/9 (May 1951): 5. L. H.: thumb D key, C# and whisper key. All R. H. optional: cover B hole; close G and F keys.

x x x |(x)o x F
  c# w
    D

Heckel-system bassoon fingerings by note name