Additional
Information: Composers who compose atonal music, which is defined by the "Oxford Companion to Music" as music with the absence of a key. Schonberg was one of the first composers to do this.
Symmetrical Melodies and Scales Yahoo Group Symmetrical Melodies and Scales Yahoo Group: Includes MIDI files of symmetrical 13-note all-interval-class/all-contour melodies, which are a conceptual basis for a new conception of tonality that transcends the archaic tonal/atonal opposition. (Atonality) http://groups.yahoo.com/group/SymmetricalMelodiesAndScales/
Atonality, Information, and the Politics of Perception Atonality, Information, and the Politics of Perception: The psychological basis of atonality. (Atonality) http://www.thinkingapplied.com/tonality_folder/tonality.htm
Atonality. Atonality.: Article from The Columbia Encyclopedia, Sixth Edition. 2001. (Atonality) http://www.bartleby.com/65/at/atonalit.html