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Articles 1 to 15 of 17
idée fixe
A term used by Berlioz for a recurring theme in his symphonic works.
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idiophone
A generic term for instruments that, when they are struck, produce the sound themselves.
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imitation
A polyphonic technique in which the melodic shape of one voice is repeated by another, usually at a different pitch; hence imitative counterpoint.
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imitation mass
Mass in which movements are based on a single POLYPHONIC model. Such as a MOTETNor MADRIGAL, all of whose voices may be borrowed or reworked; also called "parody Mass"
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impressionism
A term borrowed from painting to describe music that is intended to convey an impression (often of natural phenomena) rather than a dramatic or narrative idea.
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impromptu
A short piece, usually for piano, that suggests improvisation.
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improvisation (improvised)
Spontaneous performance without notated music, but often with reference to a tune or chord progression.
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in nomine
Cantus FIRMUS, derived from the Benedictus of Taverner's Western Wynde Mass, used in sets of instrumental VARIATIONS by English composers.
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incidental music
Music composed as a background to, or interlude in, a stage production.
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indeterminacy
Freedom from a composer's NOTATIONAL prescription.
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intermedio
Pastoral, allegorical, or mythological interlude of vocal and instrumental music performed before and between the acts of a spoken comedy or tragedy.
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intermezzo
A brief comic work performed between the acts of a serious OPERA.
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interval
The distance between two notes.
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inversion
1 The rearrangement of the notes of a chord so that the lowest note is no longer the fundamental one. 2 The performance of a melody "upside-down", with the intervals from the starting note applied in the opposite direction.
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isorhythm
A fourteenth-century technique
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