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Chord · Reference entry

C mi11♭5

mi11♭5 · C – E♭ – G♭ – B♭ – D – F · intervals P1-m3-d5-m7-M9-P11

The C mi11♭5 chord (Cm11♭5) contains the notes C, E♭, G♭, B♭, D, and F. Its interval formula is R-m3-d5-m7-M9-P11. A minor 11th with a lowered 5th — half-diminished extended, a sophisticated minor-key ii chord.

At the keyboard

C · Eb · Gb · Bb · D · F
Flashcards · Chord
Three questions on C mi11♭5
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Cm11♭5

The C mi11♭5 chord is a six-note chord made up of C, E♭, G♭, B♭, D, and F. It is built from a root, minor third, diminished fifth, minor seventh, major ninth, and perfect eleventh.

Construction

C mi11♭5 = Root + Minor 3rd + Diminished 5th + Minor 7th + Major 2nd + Perfect 4th = C · E♭ · G♭ · B♭ · D · F
NoteIntervalDegree
CRoot1
E♭Minor 3rd♭3
G♭Diminished 5th♭5
B♭Minor 7th♭7
DMajor 2nd9
FPerfect 4th11

Key Signature

A chord has no key signature of its own, but the C mi11♭5 is the tonic (I) chord of C Major, whose key signature has no sharps or flats.

Chords in the Key of C Major

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

C1C2C3CEGC5C6C7C8
IC Major (major)
DegreeNumeralChordQuality
1IC MajorMajor
2iiD MinorMinor
3iiiE MinorMinor
4IVF MajorMajor
5VG MajorMajor
6viA MinorMinor
7vii°B DiminishedDiminished

C mi11♭5 — Frequently Asked Questions

What is the C mi11♭5 chord on piano?
The C mi11♭5 chord contains the notes C – E♭ – G♭ – B♭ – D – F. On piano, play these notes together to sound the chord.
What notes are in the C mi11♭5 chord?
The C mi11♭5 chord (Cmi11♭5) contains 6 notes: C, Eb, Gb, Bb, D, F. Formula: R-m3-d5-m7-M9-P11.
How is Cmi11♭5 used in music?
Cmi11♭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 Cmi11♭5?
Cmi11♭5 uses scale degrees 1-b3-b5-b7-9-11, 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

    Prout, Ebenezer(1889)

    Harmony: Its Theory and Practice

    Public domain treatise
  2. 2

    Goetschius, Percy(1889)

    The Material Used in Musical Composition

    Public domain treatise
  3. 3

    Beethoven, Ludwig van(1799)

    Piano Sonata No. 8 in C minor, Op. 13 ("Pathétique")

    Public domain score
  4. 4

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Entry reviewed and maintained by Justin Evans. Corrections are read and applied.Report an error

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