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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 ...
Hour groups: IPFs with only one or two interval classes can often be related to a single hour, and relabelled using the Roman numeral hour notation to make this relationship clear. For instance, the tetrachord IPF 242 clearly relates to the eighth hour, IPF 2-4 (set-class 3-8 in pc-set theory).
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 first two of these are the same as the first two tetrachords of the Greater Perfect System, with a third tetrachord placed above the Meson. When all these are considered together, with the Synemmenon tetrachord placed between the Meson and Diezeugmenon tetrachords, they make up the Immutable (or Unmodulating) System (systema
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.
2025 has been consumed with cosmic chaos, and the year has just begun.. We kicked off the new year amidst three planetary retrogrades. Uranus, who is the revolutionary and rebellious celestial ...
The Andalusian cadence (diatonic phrygian tetrachord) is a term adopted from flamenco music for a chord progression comprising four chords descending stepwise: iv–III–II–I progression with respect to the Phrygian mode or i–VII–VI–V progression with respect to the Aeolian mode (minor). [1] It is otherwise known as the minor ...
Psychologists Arthur and Elaine Aron are known for research behind the “36 Questions That Lead to Love.” They share how their relationship has lasted over 50 years.