tetrachord

n.

四度音阶，四弦琴；

Divisions of the Tetrachord
The Descending Tetrachord: An Emblem of Lament
Hyperscales and the Generalized Tetrachord
A Tetrahedral Graph of Tetrachordal Voice-Leading Space
Arithmetic and Geometric Divisions of the Tetrachord
Exploring Tetrachordal Voice Leading: ZAUBER and Related Constellations in Elliott Carter's "Dolphin"
Divisions of the Tetrachord: A Prolegomenon to the Construction of Musical Scales by John H. Chalmers,
Why Are There Twenty-Nine Tetrachords? A Tutorial on Combinatorics and Enumeration in Music Theory
Structural and Transformational Properties of All-Interval Tetrachords
“The middling temper of nourishment”: Biblical Exegesis and the Art of Indeterminate Balance in Tetrachordon