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
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}
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).