[3](Tovey) a group of themes within a section of form that are united by virtue of being in the same key.

The level at which each concept is most often introduced is indicated by the numbers 0-4 in brackets, where 0 is pre-college level, 1-4 are various levels of undergraduate theory, and 5 is graduate level. Names of the originators of recent terms, when known, are indicated in parentheses.

A

[3] music which has no associations outside itself; it has no text, and does not attempt to narrate a story, portray characters, events, impressions, etc.; e.g., Bach's fugues.

[4] musical notation that directs the performer in a course of action without indicating the resulting sound. Syn. process notation; e.g., John Cage's 4'33"

suffix (set theory, nonlinear) ; [4] a set of pitch classes, the prefix of which indicates the number of pitch classes; e.g. dyad, hexad, pentad. However, the term triad

[1,2] purely vocal (or choral) music, without instrumental accompaniment.

[0] signs used in musical notation to alter notes, e.g. sharps (#), flats, naturals; however, accidentals are not key signatures.

[0,1] a mode consisting of T-S-T-T-S-T-T (T=whole tone, S=semitone), equivalent to the natural minor mode. Note the difference between mode

[4] (set theory, linear) 1. any combination of all twelve pcs. 2. (Babbitt) a vertical combination of hexachords