tetrachord
Perfect fourth sequence
A tetrachord is a series of four notes spanning the interval of a perfect fourth.
In ancient Greek music theory, tetrachords were the building blocks of scales—two tetrachords combined to form an octave.
The term persists in music theory: The major scale consists of two tetrachords separated by a whole step.
Duration between two points
- semitoneMinimum Western musical interval
- diatonicSeven-tone scale-based
- chromaticRelating to color
- enharmonicSonically identical, spelled differently
genus · species · disjunct · conjunct · meson · fourth · perfect · spanning
Small plucked string instrument
- doctrineEstablished body of teachings
- tuningAdjusting pitch accuracy
- philosophyStudy of fundamental truths
- mathematicsScience of quantity and structure
aesthetics · intonation · modes · genera · harmonics · trite
interval
Duration between two points
enharmonic · genus · species · disjunct · conjunct · meson · fourth · perfect · spanning · bounded
lyre
Small plucked string instrument
- doctrineEstablished body of teachings
- tuningAdjusting pitch accuracy
- philosophyStudy of fundamental truths
mathematics · aesthetics · intonation · modes · genera · harmonics · trite
octave
Eight-note interval
minor · pentatonic · melodic · harmonic · transposition · key · tonality · degree · tonic · dominant