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In music theory, a tetrachord (Greek: τετράχορδoν; Latin: tetrachordum) is a series of four notes separated by three intervals.In traditional music theory, a tetrachord always spanned the interval of a perfect fourth, a 4:3 frequency proportion (approx. 498 cents)—but in modern use it means any four-note segment of a scale or tone row, not necessarily related to a particular tuning ...
Tetrachord Note order Step to next note (Number of steps) Note name starting from Rast [1] Rast pentachord: Rast tetrachord: 1 T (9) Rast 2 K (8) Dügâh 3 S (5)
The sub-intervals of the tetrachord were unequal, with the largest intervals always at the top, and the smallest at the bottom. The 'characteristic interval' of a tetrachord is its largest one. The Greater Perfect System ( systema teleion meizon ) was composed of four stacked tetrachords called (from lowest to highest) the Hypaton , Meson ...
Dominant seventh chord on C: C 7 Play ⓘ.. A tetrad is a set of four notes in music theory.When these four notes form a tertian chord they are more specifically called a seventh chord, after the diatonic interval from the root of the chord to its fourth note (in root position close voicing).
Post-tonal music theory is the set of theories put forward to describe music written outside of, or 'after', the tonal system of the common practice period.It revolves around the idea of 'emancipating dissonance', that is, freeing the structure of music from the familiar harmonic patterns that are derived from natural overtones.
The double-flat symbol is used for modern notation of the third tone in the tetrachord to follow modern convention of keeping scale notes as a letter sequence, and to remind the reader that the third tone in an enharmonic tetrachord (say F, shown above) was not tuned quite the same as the second note in a diatonic or chromatic scale (the ...
The tone clock, and its related compositional theory tone-clock theory, is a post-tonal music composition technique, developed by composers Peter Schat and Jenny McLeod.The purpose of the tone-clock is to consistently order chromatic pitches into 12 triads where each pitch is used only once. [1]
In Turkish classical music, the Uşşak pitch class set is a set of scales that are named after the Uşşak or Hüseynî makams.For Uşşak, there is the Uşşak tetrachord and the Hüseynî pentachord.