abbreviations
"Tr" - a traditional, usually academic definition or symbol
"Ex-" - example

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

e
Abbreviation for an. seeNote-values

E
Abbreviation for an.

ELEVENTH
Tr- Distance, in the Quantitative Dimension of Pitch (frequency) seeInterval

ENERGY
One of the 3 Worlds of Music - its Quantitative Dimension is the Volume of a note and its Qualitative Dimension is the Timbre of the note. This world is more pertinent to performance than to the actual structure of a piece of music.

ENTITIES
Sections which come to a close or cadence and are perceived as wholes, inMelo-rhythm,Melo-harmony, andMelo-lines, preferably of different lengths.

EQUI-TEMPERED TUNING
The octave is divided into 12 equal semi-tones (diatonic or chromatic), each interval maintaining a constant size. seeIntonation