To the sound sample  

For a better understanding, a few explanations:
The middle three fingers in both hands are numbered consecutively, i.e. index finger = 1, middle finger = 2, ring finger = 3.
The keys are indicated in function, in the lowest octave with capital letters and from the upper b from the upper b-flat upwards with lower case letters.
The left hand is abbreviated by a small The left hand is abbreviated by a small "l." and the right hand accordingly by an "r.". Cleft sounds are produced by overblowing low notes (increased lip and air pressure), by underblowing high notes (letting the embouchure slack), or when a fingering is or when a fingering is altered by opening one or more tone holes or keys, thereby thereby interrupting the air column.
These cleavage sounds often consist of a large number of partials and to a large extent also contain microintervals. The notated tone often has little in common with the actual sound, which is why it is represented as a rhombus. it is represented as a rhombus.
By varying the pressure of the lips, the can be varied greatly, and it takes a certain amount of practice to find the to produce a sound that suits the character of the piece.produce.