Entertainment / Music / Atonal: Music that is written and performed without regard to any specific key.
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Entertainment / Music / Atonality: Total abandonment of tonality (centering in a key). Atonal music moves from one level of dissonance to another, without areas of relaxation. MORE
Entertainment / Music / Expressionism: Atonal and violent style used as a means of evoking heightened emotions and states of mind. MORE