Tetrad (music): Difference between revisions
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In music theory, a ''tetrad'' is a set of four notes. When these four notes form a tertian chord they are more particularly and more commonly referred to as a ''seventh chord'', after the diatonic interval from the root of the chord to its fourth note (in root position close voicing). Four-note chords are often formed of intervals other than thirds in twentieth-century music, however, where they are more generally referred to as ''tetrads'' (see, for example, Howard Hanson's ''Harmonic Materials of Modern Music: Resources of the Tempered Scale'' and Carleton Gamer's, "Some Combinational Resources of Equal-Tempered Systems"). A four-note segment of a scale or twelve-tone row is more particularly known as a ''tetrachord'', although Allen Forte in his ''The Structure of Atonal Music'' uses the term ''tetrachord'' synonymously with ''tetrad''. |
In music theory, a ''tetrad'' is a set of four notes. When these four notes form a tertian chord they are more particularly and more commonly referred to as a ''seventh chord'', after the diatonic interval from the root of the chord to its fourth note (in root position close voicing). Four-note chords are often formed of intervals other than thirds in twentieth-century music, however, where they are more generally referred to as ''tetrads'' (see, for example, Howard Hanson's ''Harmonic Materials of Modern Music: Resources of the Tempered Scale'' and Carleton Gamer's, "Some Combinational Resources of Equal-Tempered Systems"). A four-note segment of a scale or twelve-tone row is more particularly known as a ''tetrachord'', although Allen Forte in his ''The Structure of Atonal Music'' uses the term ''tetrachord'' synonymously with ''tetrad''. |
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==See also== |
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*[[Tetrachord]] |
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*[[Hexachord]] |
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*[[Triad]] |
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*[[Dyad]] |
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*[[Monad]] |
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Revision as of 23:56, 18 May 2007
In music theory, a tetrad is a set of four notes. When these four notes form a tertian chord they are more particularly and more commonly referred to as a seventh chord, after the diatonic interval from the root of the chord to its fourth note (in root position close voicing). Four-note chords are often formed of intervals other than thirds in twentieth-century music, however, where they are more generally referred to as tetrads (see, for example, Howard Hanson's Harmonic Materials of Modern Music: Resources of the Tempered Scale and Carleton Gamer's, "Some Combinational Resources of Equal-Tempered Systems"). A four-note segment of a scale or twelve-tone row is more particularly known as a tetrachord, although Allen Forte in his The Structure of Atonal Music uses the term tetrachord synonymously with tetrad.