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You are here: Home / Music Theory / Chords / Diminished and Half-Diminished Seven Chords

Diminished and Half-Diminished Seven Chords

January 15, 2012 By stevehorn

The diminished seven (1-b3-b5-bb7) and half diminished seven (1-b3-b5-b7) chords are built upon a diminished triad.  Despite this similarity and despite the tendency of some musicians to treat these chords the same, the two can function very differently.  Each can serve in a dominant function and resolve to a major or minor triad whose root is a half-step higher. However, the half diminished seven also functions as a subdominant chord in minor keys (iiø7 – V7 – i7). The ii-V relationship is one of the most common harmonic idioms in jazz and popular music. The fully diminished seven chord almost always functions in a dominant capacity.  It is one of the most easily transposable chords in music and serves as a handy device for transposing to far-off keys.  All this put aside, let it be said that these two chords offer very different possibilities for use in music.

The Diminished Seven Chord

Fully Diminshed Seven Chord

C diminished 7 (C – Eb – Gb – Bbb)

C diminished 7

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The Half Diminished Seven Chord

half diminished seven chord

C Half Diminshed 7 or Cm7b5 (C – Eb – Gb – Bb)

C half-diminished 7

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Filed Under: Chords, Music Theory

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  1. Jazz Chord Theory - MandoSimean says:
    May 19, 2012 at 5:56 pm

    […] Diminished and Half Diminished 7 chords […]

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