Some use is made of octaves and drones to vary the texture.
Movement during the performance of the structure might transform the pitch space within a range from one semitone to six octaves. 12.
In order to get rid of it entirely, one has to increase the number of notes to more than 300 per octave.
On the left-hand side of the board there is a kind of keyboard which corresponds to five octaves of pitch.
Notes common to the harmony and the upper layers are ringed (whether in the same octave or others).
Ideally there should be eight perceivable repetitions (decaying away) which would be an octave transposition (8 6 3/4 tone) in all.
When we simultaneously and continuously move the frequencies of the ten sinusoids to one octave above, we return to the same spectrum.
Of the various practical solutions proposed, the one that triumphed was the idea of tuning 12 exactly equal semi-tones in an octave.
