Eb Diminished Triad

Chord Tones: Eb Diminished Triad

Symbol: dim, ° — Formula: 1-♭3-♭5

DegreeNoteFrequency (A=440, Equal)
1 Eb 311.127 Hz
♭3 Gb 369.994 Hz
♭5 A 440.000 Hz

Chord Notation

Notation TypeSymbol / Value
Lead Sheet SymbolEbdim
All Common Symbolsdim, °
Interval Formula1-♭3-♭5
Harmonic Categorydissonant

Roman numeral (e.g. I, IV, V) and Nashville Number notation are key-dependent. See Keys pages for chord function within specific keys.

Inversions

InversionNotes (low to high)Bass NoteSlash Notation
Root Position Eb Gb A Eb Eb Diminished Triad
First Inversion Gb A Eb Gb Eb Diminished Triad/Gb
Second Inversion A Eb Gb A Eb Diminished Triad/A

Harmonic Function

The Eb diminished chord commonly functions as the mediant (♭III) in C minor or subdominant in B♭ major. Its harmonic role varies by key — in major keys it provides stable harmonic grounding.

The diminished triad features a flat third and flat fifth, creating a tense, unstable sound. It occurs naturally on the seventh degree of the major scale and resolves strongly to the tonic.

Common Progressions

The Eb Diminished Triad frequently appears in these progression patterns (shown in Roman numeral notation relative to key):

Songs Featuring the Diminished Triad

Well-known songs where the Eb Diminished Triad — or this chord type — plays a prominent role:

Tuning Frequencies Across Temperaments

Frequencies shown at A=440 Hz. View full temperament data for any note.

NoteEqual Temp.PythagoreanJust Intonation
Eb 311.127 Hz 309.026 Hz 313.951 Hz
Gb 369.994 Hz 371.251 Hz 367.911 Hz
A 440.000 Hz 440.000 Hz 436.043 Hz

Scales Containing the Eb Diminished Triad

These scales include the Eb Diminished Triad as a diatonic or characteristic chord: