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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 ...
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]
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).
The notes of the central tetrachord of the system in ascending order are hypate, parhypate, lichanos (or hypermese), and mese. A second tetrachord is added above, after a disjunctive tone, and the corresponding names (together with the interval ratios of the standing tones) are: [6] mese (4:3) – nete (2:1) (standing) lichanos – paranete ...
The Phrygian progression creates a descending tetrachord bassline: -♭-♭ - . Phrygian half cadence : i-v6-iv6-V in c minor (bassline: c -b ♭ -a ♭ -g) Play ⓘ . In music theory , the descending tetrachord is a series of four notes from a scale , or tetrachord , arranged in order from highest to lowest, or descending order.
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) Segâh 4 T (9) (Only for pentachord) Çârgâh - 5 - Neva
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A minor seventh would be added to the dominant "V" chord to increase tension before resolution (V 7 –i). [2] The roots of the chords belong to a modern phrygian tetrachord (the equivalent of a Greek Dorian tetrachord, [10] the latter mentioned above), that is to be found as the upper tetrachord of a natural minor scale (for A minor, they are: A G F E).