Disjunct tetrachords

(Mus.) tetrachords so disposed to each other that the gravest note of the upper is one note higher than the acutest note of the other.

See also: Disjunct

References in periodicals archive ?
The two anonymous treatises that it translates have become celebrated for a variety of reasons: the `poor Greek and worse Latin' (Palisca's phrase) of their titles, their system of disjunct tetrachords and its expression in `dasian' (or `daseian') characters, and their account of what was evidently a contemporary form of polyphonic practice.
Instead, these theorists adopted an 18-note system consisting entirely of disjunct tetrachords of the form tone-semitone-tone.
Thereafter (measure 159), the manuals begin the dramatic ascent to the highest notes of the piece, each hand playing primarily in disjunct tetrachords voiced as interlocked pi5s, pi6s and pi7s.