Ab4-Bb4 (downtrill). Barris, Robert (25 May 1995).

Ab4 start:          Ab4-Bb4 (downtrill):
x x x | o o o F     x x x | o o G-tr F-tr
 a c#  Bb            a c#  Bb

Ab4-Bb4 (downtrill). Birnstingl, Roger. In Klimko, Ronald. Bassoon Performance Practices and Teaching in the United States and Canada. Idaho: University of Idaho, 1974, p. 70.

Ab4 start:       Bb4-Ab4:
/ x x | o o x    / x x | o x o F
   w              a c#  Bb-tr

Ab4-Bb4. Christlieb, Don. Pictoral Fingerings for Bassoon. Published by author, 1966, p. 27.

       Eb
o  x  x  | o o x F-tr
 a-tr c#-tr

               F#-tr
x x x | x x tr F-tr
 a c#  Bb

Ab4-Bb4. Cooper, L. Hugh. The Double Reed 1/2 (October 1978): 13.

     Eb
x x tr | o x o F
 a c#   Bb

Ab4-Bb4. Corey, Gerald (25 May 1995).

trill all together:

           c#-tr
4/5  x  x | o x x
d-tr c-tr

Ab4-Bb4. Corey, Gerald (Feb. 1999). For Bb4 add all trill keys together:

           c#-tr
4/5  x  x | o x x
c-tr a-tr  Bb-tr

Ab4-Bb4 (downtrill). Grossman, Arthur (25 May 1995).

x x x | o x o F
 a c#  Bb-tr

Ab4-Bb4. Harris, Truman.

     Eb        F#
x x tr | tr tr x 
  a c#  Bb

Ab4-Bb4. Jeremias, Isabel. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 70.

x x x | x tr o F
 c

Ab4-Bb4 (downtrill). Lacy, Ed (25 May 1995).

Ab4 start:            Ab4-Bb4 (downtrill): 

/ x x | o x x         x x x | o tr x
   w   Bb                    Bb

Ab4-Bb4. Leep, Jeff. In Klimko, Ronald. Bassoon Performance Practices and Teaching in the United States and Canada. Idaho: University of Idaho, 1974, p. 67.

    Eb
x x x | x tr o Ab
 a c#  Bb

Ab4-Bb4. Moritz, Frederick. To the World's Bassoonists 6/1 (1976): 7.

       Eb
x  x  x  | o o x
c-tr a-tr

"Lift G key to resolve downwards to G[4]":

       Eb
x  x  x  | x o x
c-tr a-tr Bb

Ab4-Bb4. Rechtman, Mordechai. To the World's Bassoonists 5/1 (1975): 5.

    Eb
x x x | o x o F
 a c#  Bb-tr

Ab4-Bb4. Rechtman, Mordechai. The Double Reed 6/1 (Spring 1983): 9.

     Eb
x x tr | o tr o F
 a c#   Bb E

Ab4-Bb4. Schoenbach, Sol. In Klimko, Ronald. Bassoon Performance Practices and Teaching in the United States and Canada. Idaho: University of Idaho, 1974, p. 68. Also in To the World's Bassoonists 5/1 (1975): 5. Trill R. H. G and F keys together.

x x x | x x tr F-tr
 a c#  Bb

Ab4-Bb4. Timm, Everett LeRoy. The Woodwinds; Performance and Instructional Techniques. Boston: Allyn and Bacon, 1964, p. 176.

      Eb
x tr tr | x x x F
  a c#

       Eb
/  x  x  | o o x tr
c-tr a-tr

         Eb
x   x   x   |  o  o  x  F
c-tr a-tr c#-tr

Ab4-Bb4. Wadin, Edward. In Klimko, Ronald. Bassoon Performance Practices and Teaching in the United States and Canada. Idaho: University of Idaho, 1974, p. 70.

/ x x | tr o o F
   w   Bb-tr

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