It is called twelve-tone technique, which is a form of serialism.
Schoenberg
the twelve tone system
Twelve is twelve, PERIOD
The tones within a scale are divided by either tones or semitones. In a major scale, the order always goes: tone, tone, semitone, tone, tone, tone, semitone. For a minor scale, in natural form, the order always goes: tone, semitone, tone, tone, semitone, tone, tone.
Arnold Schoenberg
The twelve-tone technique is a style of atonal music in which none of the 12 notes in the chromatic scale is used any more or less than any other note in the scale.
Arnold Schoenberg
It is called twelve-tone technique, which is a form of serialism.
twelve-tone technique. This type of composition ensures that all 12 notes of the musical scale are sounded as often as one another in a piece of music. All the 12 notes are thus given more or less equal importance, thus avoiding being in a key
The twelve-tone technique is a style of atonal music in which none of the 12 notes in the chromatic scale is used any more or less than any other note in the scale.
twelve-tone system
The tone row is a predetermined sequence of all twelve notes of the chromatic scale.
augmentation
Tone rows can appear in retrograde, inversion, retrograde inversion forms in a twelve-tone composition. The "diatonic" form is not a valid form for a tone row in twelve-tone composition.
48 possible tone rows
Schoenberg