12 tone music is a large body of music, written roughly since World War I

So many people are finding it difficult to know what this is all about even though they hear of it most times. It is wonderful to have knowledge about what you desperately desire to know about. This article has the quality of an objective investigation because it is reliable and valid. It is logical and systematic as well as cumulative since it does not develop in isolation but tries to build on or develop existing knowledge.  It is in this light that I would want to enlighten you as well as educate you on this topic to be discussed. 12 tone music is a large body of music, written roughly since World War I, that uses the so-called 12-tone method or technique of composition. The Austrian-born composer Arnold Schoenberg is credited with the invention of this technique, although other composers (e.g., the American composer Charles Ives and the Austrian Josef Hauer) anticipated Schoenberg's invention by writing music that in a few respects was similar technically to his 12-tone music.Between 1912 and 1922 Schoenberg came to realize that he was searching for a new method of composition that would provide a new basis for musical structure to replace the old basis of tonality, which he felt was being stretched and distorted too much to remain a unifying structural principle. Instead of using 1 or 2 tones as main points of focus for an entire composition (as key centres in tonal music), Schoenberg suggested using all 12 tones “related only to one another.” In such a system, unlike tonality, no notes would predominate as focal points, nor would any hierarchy of importance be assigned to the individual tones.

The new unifying principle in composition would then arise from the particular order given to a collection of the 12 tones, an order that would be different for each composition. The basic order for any one composition came to be known as its basic set, its 12-tone row, or its 12-tone series, all of which terms are synonymous. The basic set for Schoenberg's Wind Quintet (1924) is E♭–G–A–B–C♯–C–B♭–D–E–F♯–A♭–F; for his String Quartet No. 4 (1936) it is D–C♯–A–B♭–F–E♭–E–C–A♭–G–F♯–B.

The basic set is not a theme, for it has no specific shape, rhythm, or loudness. It is a backbone, a musical idea that permeates the composition in which it is used. Because of the various principles of composing and manipulating the basic set recognized by Schoenberg and others, it is not often possible nor even desirable to hear the basic set when the composition is performed. This situation has led many people to attack Schoenberg's method as unmusical and as mathematical madness. Such views seem unjustifiable, because, as Schoenberg pointed out, his method specifies only a tiny fraction of the total nature of a composition—certainly no more than composing with tonality specifies.

Schoenberg's best-known pupils were the Austrian composers Anton von Webern and Alban Berg, each of whom wrote 12-tone music. Neither used the idea of the basic set in the same manner as Schoenberg did, and their music differs greatly in many respects from each other's and from Schoenberg's. Other important composers include the Russian-born Igor Stravinsky, the American Roger Sessions, the Austrian-born Ernst Krenek, the Italian Luigi Dallapiccola, and the German Hans Werner Henze. Many, such as Stravinsky (who had earlier criticized the approach severely) and Sessions, began writing 12-tone music after composing much non-12-tone music.

Some composers also have used some of the notions behind the basic set while simultaneously writing tonal music; among them are Schoenberg himself, the Austrian-born Ernst Toch, the American Walter Piston, and the Russian Dmitry Shostakovich. The American composer Benjamin Johnston combined principles of 12-tone music with microtonality (use of intervals smaller than whole tones or semitones). There are no sufficient analytic techniques used by musicians in understanding 12-tone music, which is partly why it remains not very well understood as a total musical phenomenon by composers, performers, and listeners alike. Twelve-tone music is an example of serialism (q.v.) in music.

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