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Chord · Reference entry

D♯ mi13♭5

mi13♭5 · D♯ – F♯ – A – C♯ – E♯ – G♯ – B♯ · intervals P1-m3-d5-m7-M9-P11-M13

The D♯ mi13♭5 chord (D♯m13♭5) contains the notes D♯, F♯, A, C♯, E♯, G♯, and B♯. Its interval formula is R-m3-d5-m7-M9-P11-M13. A minor 13th with a lowered 5th — half-diminished further extended, a modern jazz voicing.

E♭ mi13♭5
This is the same chord as E♭ mi13♭5 — the same keys on the keyboard, spelled with flats.

At the keyboard

D# · F# · A · C# · E# · G# · B#
Maintained by Justin Evans, a pianist of 25 years
Maintained for accuracy · Last updated July 2026 · How we review
Flashcards · Chord
Three questions on D♯ mi13♭5
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D♯m13♭5

The D♯ mi13♭5 chord is a seven-note chord made up of D♯, F♯, A, C♯, E♯, G♯, and B♯. It is built from a root, minor third, diminished fifth, minor seventh, major ninth, perfect eleventh, and major thirteenth.

Construction

D♯ mi13♭5 = Root + Minor 3rd + Diminished 5th + Minor 7th + Major 2nd + Perfect 4th + Major 6th = D♯ · F♯ · A · C♯ · E♯ · G♯ · B♯
NoteIntervalDegree
D♯Root1
F♯Minor 3rd♭3
ADiminished 5th♭5
C♯Minor 7th♭7
E♯Major 2nd9
G♯Perfect 4th11
B♯Major 6th13

Key Signature

A chord has no key signature of its own, but the D♯ mi13♭5 is the tonic (I) chord of D# Major, whose key signature has 3 flats (B♭, E♭, A♭).

B♭E♭A♭

Order of flats

Flats are added in a fixed order — the reverse of the sharp order. Each new flat key adds the next flat on the list.

B♭E♭A♭D♭G♭C♭F♭

Mnemonic: Battle Ends And Down Goes Charles’ Father

Chords in the Key of D♯ Major

These are the triads built on each degree of the D♯ major scale:

C1C2C3C4F♯♯C5C6C7C8D♯A♯
I — D♯ Major (major)
DegreeNumeralChordQuality
1ID♯ MajorMajor
2iiF MinorMinor
3iiiG MinorMinor
4IVG♯ MajorMajor
5VA♯ MajorMajor
6viC MinorMinor
7vii°D DiminishedDiminished

D♯ mi13♭5 — Frequently Asked Questions

What is the D♯ mi13♭5 chord on piano?
The D♯ mi13♭5 chord contains the notes D♯ – F♯ – A – C♯ – E♯ – G♯ – B♯. On piano, play these notes together to sound the chord.
What notes are in the D# mi13♭5 chord?
The D# mi13♭5 chord (D#mi13♭5) contains 7 notes: D#, F#, A, C#, F, G#, C. Formula: R-m3-d5-m7-M9-P11-M13.
How is D#mi13♭5 used in music?
D#mi13♭5 is used in jazz, fusion, and contemporary music to add harmonic color. It appears as a dominant or tonic chord depending on context.
What is the scale degree formula for D#mi13♭5?
D#mi13♭5 uses scale degrees 1-b3-b5-b7-9-11-13, giving it its distinctive sound.

Related Tools

Chord FinderLook up any chord — see the notes, hear it, and play along.Chord DrillTimed drills to build speed and recognition across all chord types.Practice RoomPlug in a MIDI keyboard and get real-time feedback on every chord and scale.Circle of FifthsVisualize key relationships, relative minors, and key signatures.MIDI MonitorLive MIDI message stream with note names, velocity, and a scrolling staff.

References & Further Reading

The note names, intervals, fingering, and harmony on this chord page are grounded in the following sources. Public domain treatises and scores are linked to their full text; primary data is piano.org's own interval-derived reference dataset — continuously maintained and human-verified, with no fixed publication date.

  1. 1

    Jadassohn, Salomon(1883)

    A Manual of Harmony

    Public domain treatise
  2. 2

    Prout, Ebenezer(1889)

    Harmony: Its Theory and Practice

    Public domain treatise
  3. 3

    Goetschius, Percy(1889)

    The Material Used in Musical Composition

    Public domain treatise
  4. 4

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