Trill 
Fingering Chart for Heckel-System Bassoon
Second 
Octave: F 3 to F4
3 to F4
This 
fingering chart includes trill fingerings, which are fingerings designed for rapid 
alternation between two notes at an interval of a minor second (semitone) or a 
major second (whole tone) apart. Many of these fingerings can also be used as 
alternate fingerings for some fast passages. Keys to be trilled are indicated 
in red. When more than one key is to be trilled, 
the keys should be simultaneously pressed and simultaneously released, unless 
the description says to alternate pressing and releasing the keys. The fingerings 
apply to Heckel-system (German) bassoons and contrabassoons. 
The 
fingering scheme explains the text and keys used 
to depict fingerings.