Hauer and the twelve-note music

Earlier than Arnold Schönberg and from a different vantage-point Josef Matthias Hauer devised a mildly dissonant twelve-note system. From 1913 on he developed his twelve-note ideas first intuitively, later on consciously; starting from a "building-block-technique" (blocks of 10, 11, 12 notes) he arrived at the twelve-note system via the trope technique. For this purpose he developed his own notation without accidentals. His compositions met with the same lack of understanding as his philosophy which was less influenced by European music tradition than by Chinese philosophy and which found its esoteric expression in his twelve-note pieces.

Schönberg and the twelve-note music 

Further information:
Die 3 Wiener Zwölftonschulen