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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) Segâh 4 T (9) (Only for pentachord) Çârgâh - 5 - Neva
Tetrachord Note order Step to next note (Number of steps) Note name starting from Çârgâh [Note 1] Çârgâh pentachord Çârgâh tetrachord (starting from Çârgâh) 1 T (9) Çârgâh 2 T (9) Neva 3 B (4) Hüseynî 4 T (9) Acem - 5 - Gerdaniye
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 ...
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).
Tetrachord Note order Step to next note (Number of steps) Note name starting from Dügâh [1] Hicaz pentachord Hicaz tetrachord 1 S (5) Dügâh 2 A (12) Dik Kürdî 3 S (5) Nim Hicâz 4 T (9) (Only for pentachord) Neva - 5 - Hüseynî
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All-interval tetrachords (Play ⓘ).An all-interval tetrachord is a tetrachord, a collection of four pitch classes, containing all six interval classes. [1] There are only two possible all-interval tetrachords (to within inversion), when expressed in prime form.