In
music and
music theory augmentation is the lengthening or widening of
rhythms,
melodies,
intervals,
chords. The opposite is
diminution (as in "a diminished triad").A melody or series of
notes is augmented if the lengths of the notes are prolonged. A melody originally consisting of four quavers (eighth-notes) for example, is augmented if it later appears with four crotchets (quarter-notes) instead. This technique is often used in
contrapuntal music. It gives rise to the "
canon in augmentation", in which the notes in the following voice are longer than those in the leading. The music of
Johann Sebastian Bach provides examples of this application.
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