_harmonica_.
1. The first division of music, which is called _harmonica_, that is,
modulation of the voice, has to do with comedians, tragedians, and
choruses, and all who sing with the proper voice.[260] This [coming]
from the spirit and the body makes motion, and out of motion, sound,
out of which music is formed, which is called in man the voice.
[260] _Qui voce propria canunt._
2. _Harmonica_ is the modulation of the voice and the concord or
fitting together of very many sounds.
3. _Symphonia_ is the managing of modulation so that high and
low tones accord, whether in the voice or in wind or stringed
instruments. Through this, higher and lower voices harmonize, so that
whoever makes a dissonance from it offends the sense of hearing.
The opposite of this is _diaphonia_, that is, voices grating on one
another or in dissonance.
7. _Tonus_ is a high utterance of voice. For it is a difference and
measure of harmony which depends on the stress and pitch of the
voice. Musicians have divided its kinds into fifteen parts, of which
the hyperlydian is the last and highest, the hypodorian the lowest of
all.
8. Song is the modulation of the voice, for sound is unmodulated, and
sound precedes song.