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Subsidiary chord

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Subsidiary chord
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In music and musical analysis, a subsidiary chord is an elaboration of a principal harmonic chord in a chord progression.

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Tonic and tonic parallel in C major: CM and Am chords Play.

If the principal chord (X) is partially replaced by the subsidiary (Y), there are three possible positions - beginning, middle, and end - for the subsidiary:[1]

X–Ya
Y–X
X–Y–X
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Modulation with subsidiary chord (in blue).[2] Play

For example, a subsidiary chord in a modulation.

A subsidiary chord may be a chord with related function and/or sharing pitches, for example in E major, Cm (C-E-G) as a subsidiary for E (E-G-B), which share two of three pitches and are related as tonic parallel (vi) and tonic (I).

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See also

References

Further reading

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