@443 oblique motion\Describes the movement of parts or melodies when one
remains on the same note and the other moves in some direction.
@444 octave\The interval of eight steps (e.g. C to C on the white notes of the
piano).
@445 octet\A composition for eight voices or instruments, or simply eight
people.
@446 ode\The setting of a poem entitled 'ode' to music.
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