Next chapter:
Attack and influence on the air stream
1. Key percussion
2. Slap tongue
3. Tongue ram
4. Flatterzunge

  

1. Multiphonics
Two or more tones sounding at the same time (chord).

Performed (most often) with alternative fingering, combinated with changing of the embouchure, increased or reduced air pressure and possibly turbulence of the air stream. Most often written with chord and fingering:
     

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It is also possible to trill in or between multiphonics:

 
 

 

2. With voice
Singing a different pitch from the one played;

a. singing a descant, or
b. singing different notes and playing a descant, or
c. the two parts in counterpoint

Written in one or two systems:

     

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