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A dissonance is any combination of musical
TONES not in a state of repose (consonance) that produces
the feeling that movement or resolution toward the consonant
state is required. Aurally, the distinction between consonance
and dissonance is subjective, a difference between agreeable
and disagreeable sounds. Dissonance makes the music more interesting
because it breaks up otherwise unrelieved repetitions of the
primary triads . The earliest categorization of consonance
and dissonance was made by the Greek philosopher and mathematician
PYTHAGORAS OF SAMOS. Although mathematics and the science
of SOUND AND ACOUSTICS have figured in the distinctions between
consonance and dissonance, the musical values of consonances
and dissonances are determined solely by composers and listeners.
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