1 Music A scale of four notes, the interval between the first and last being a perfect fourth.
- It's written in a kind of pastiche nineteenth-century style, complete with faux-Spanish exotic syncopations, melody and harmony (falling tetrachords, augmented seconds).
- There are instances, however, where scale-motion rather conspicuously predominates, or where a melody is made largely of scale segments - of half-scales or tetrachords, for example.
- The sets are closely connected through numerous common and transpositionally or inversionally related segments, usually dyads, trichords and/or tetrachords.
1.1 historical An instrument with four strings.
- A common instrument from those times was the tetrachord, a kind of four-stringed harp.
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Line breaks: tetra|chord
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