6 note segments of a scale or tone row.
a mnemonic device first described by Guido of Arezzo,
- It was the most basic pedagogical tool for learning new music in the
- European Middle Ages.
all adjacent pitches are a whole tone apart, except for the middle two, which are separated by a semitone.
six pitches are named ut, re, mi, fa, sol, and la, with the semitone between mi and fa.
- adapted in the twentieth-century in Milton Babbitt's
- serial theory.