A diminished chord

Also called: A diminished triad
Symbols: A^o
A°
Adim
Am^♭5
Notes: A (root)
C (minor 3rd)
E-flat (diminished 5th)

Bass doubling

Sustain

This is the full, close, root-position voicing.
This is a full, open, root-position voicing.
This is the full, close, first-inversion (A diminished over C) voicing.
This is the full, close, second-inversion (A diminished over E-flat) voicing.

Type

Root

Chords built on the tonic of the diatonic modes

Lydian	A	AM⁷	AM⁹	AM^9♯11	AM^13♯11	A^add9	A^add♯11	A⁶	A^6add9	A^6add♯11	A⁵	A^sus2
Ionian		AM⁷	AM⁹	AM¹¹	AM¹³		A^add11			A^6add11			A^sus4
Mixolydian		A⁷	A⁹	A¹¹	A¹³		A^add11			A^6add11				A^7sus4	A^9sus4	A^13sus4
Dorian	Am	Am⁷	Am⁹	Am¹¹	Am¹³	Am^add9	Am^add11	Am⁶	Am^6add9	Am^6add11						A^13sus4
Aeolian			Am⁹	Am¹¹	Am^11♭13	Am^add9		Am^♭6	Am^♭6add9	Am^♭6add11
Phrygian			Am^7♭9	Am^11♭9	Am^11♭9♭13	Am^add♭9		Am^♭6	Am^♭6add♭9	Am^♭6add11
Locrian	A^o	A^ø7	A^ø7♭9	A^ø11♭9	A^{ø11♭9♭13}

Mode

Tonic

Chords built on each degree of the mode

4	E♭	E♭M⁷	E♭M⁹	E♭M^9♯11	E♭M^13♯11	E♭^add9	E♭^add♯11	E♭⁶	E♭^6add9	E♭^6add♯11	E♭⁵	E♭^sus2
1	B♭	B♭M⁷	B♭M⁹	B♭M¹¹	B♭M¹³	B♭^add9	B♭^add11	B♭⁶	B♭^6add9	B♭^6add11	B♭⁵	B♭^sus2	B♭^sus4
5	F	F⁷	F⁹	F¹¹	F¹³	F^add9	F^add11	F⁶	F^6add9	F^6add11	F⁵	F^sus2	F^sus4	F^7sus4	F^9sus4	F^13sus4
2 minor	Cm	Cm⁷	Cm⁹	Cm¹¹	Cm¹³	Cm^add9	Cm^add11	Cm⁶	Cm^6add9	Cm^6add11	C⁵	C^sus2	C^sus4	C^7sus4	C^9sus4	C^13sus4
6 minor	Gm	Gm⁷	Gm⁹	Gm¹¹	Gm^11♭13	Gm^add9	Gm^add11	Gm^♭6	Gm^♭6add9	Gm^♭6add11	G⁵	G^sus2	G^sus4	G^7sus4	G^9sus4
3 minor	Dm	Dm⁷	Dm^7♭9	Dm^11♭9	Dm^11♭9♭13	Dm^add♭9	Dm^add11	Dm^♭6	Dm^♭6add♭9	Dm^♭6add11	D⁵		D^sus4	D^7sus4
7 diminished	A^o	A^ø7	A^ø7♭9	A^ø11♭9	A^{ø11♭9♭13}

Please note: This app doesn’t include every chord, nor every name, symbol, or voicing of the included chords.