Diminished Triads - Parent Keys
(Major & Natural Minor Keys Only)


This is useful for reference when working out key centres. The tutorial on triad construction is also useful background reading.

There are also reference charts of parent keys for major and minor triads.

Triad Notes Major Keys Minor Keys
Bo B D F vii of C major ii of A minor
F#o F# A C vii of G major ii of E minor
C#o C# E G vii of D major ii of B minor
G#o G# B D vii of A major ii of F# minor
D#o D# F# A vii of E major ii of C# minor
A#o A# C# E vii of B major ii of G# minor
E#o E# G# B vii of F# major ii of D# minor
Fo F Ab Cb vii of Gb major ii of Eb minor
Co C Eb Gb vii of Db major ii of Bb minor
Go G Bb Db vii of Ab major ii of F minor
Do D F Ab vii of Eb major ii of C minor
Ao A C Eb vii of Bb major ii of G minor
Eo E G Bb vii of Fb major ii of D minor

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