The answer to the given question is Arnold Schoenberg, he is a composer who is known with abandoning music which has a tonal center and establishing 12-tone system.
Arnold Schoenberg was an Austrian-American composer, music theorist, teacher, writer, and painter. He was born in 1874 and died in 1951. Schoenberg's music from 1908 onward experiments in a variety of ways with the absence of traditional keys or tonal centers. Arnold Schoenberg developed the influential 12-tone system of composition, a radical departure from the familiar language of major and minor keys.
Understanding of Schoenberg's 12-tone system has been difficult to achieve partly due to the truly revolutionary nature of his new system. Misinformation circulated by some early writers about the system's rules and exceptions that hold little relation to the most significant features of Schoenberg's music, and the boundless unavailability of his sketches and manuscripts until the late 1970s.
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