Tone row
Sequence of all twelve chromatic tones / From Wikipedia, the free encyclopedia
"Reihe" redirects here. For the music journal, see Die Reihe.
In music, a tone row or note row (German: Reihe or Tonreihe), also series or set,[2] is a non-repetitive ordering of a set of pitch-classes, typically of the twelve notes in musical set theory of the chromatic scale, though both larger and smaller sets are sometimes found.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/2/2d/Schoenberg_-_Variations_for_Orchestra_op._31_tone_row_mirror_forms.png/640px-Schoenberg_-_Variations_for_Orchestra_op._31_tone_row_mirror_forms.png)