tetrachord
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thumb|Tetrachord based on D, 1½1 thumb|2 consecutive tetrachords, heptachord based on D, 1½11½1 In music theory, a tetrachord (; ) 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 system. Three modal patterns are possible: \new Staff \with { \consists Horizontal_bracket_engraver \remove "Time_signature_engraver" \remove "Bar_engrave
Wikidata facts
- Subclass of
- sequence
Show 3 more facts
- described by source
- Granat Encyclopedic Dictionary
- Commons category
- Tetrachords
- characteristic of
- music of ancient Greece
Sources (1)
via Wikidata · CC0
~17 min read
Encyclopedic overview
16 sectionsContents
- History
- Ancient Greek music theory
- Pythagorean tunings
- Variations
- Romantic era
- 20th-century analysis
- Atonal usage
- Non-Western scales
- India-specific tetrachord system
- Persian
- Compositional forms
- See also
- References
- Sources
- Further reading
- External links
thumb|Tetrachord based on D, 1½1 thumb|2 consecutive tetrachords, heptachord based on D, 1½11½1 In music theory, a tetrachord (; ) 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 system. Three modal patterns are possible:
\new Staff \with { \consists Horizontal_bracket_engraver \remove "Time_signature_engraver" \remove "Bar_engraver" } \relative c' { d1 e -\tweak HorizontalBracketText.text "semitone" \startGroup f\stopGroup g}
Excerpted from Wikipedia’s “tetrachord” article, available under the CC BY-SA 4.0 licence.