C# Minor 9th

Symbols:C#m9, C#min9, C#-9
Scale Degree Formula:1-♭3-5-♭7-9
Interval Stack:m3 + M3 + m3 + M3
Notes:C#, E, G#, B, D#
Hear this chord:▸ Guitar

Construction

Using the scale degree formula, we first start with the C# major scale, and number each note in the scale starting from 1 - these are the scale degrees. Next, we use the scale degree formula, in this case 1-♭3-5-♭7-9, to select notes from our enumerated scale. When a chord requires notes that are not in the scale, this is indicated with a flat (♭) or a sharp (#) along with the scale degree; a ♭3, for instance, would be one half-step down from the 3rd scale degree.
Alternatively, we can use the interval stack to construct our chord. With this approach, we first start with the lowest note of the chord (C#), then move our first interval (m3), which brings us to our second note in the chord (E). We repeatedly apply each of the remaining intervals in the stack to get the full list of notes for our chord.
The diagram below shows how both the scale degree formula and interval stack methods result in the same selection of notes:
C#1D♭2D#2E♭3F3F#4G♭5G#5A#5Bb6B♭7C7C#8D♭9D#9m3M3m3M3

Similar Chords

The following chords are similar to this chord and may be a suitable replacement in certain scenarios.

Chord TypeChords
7th Suspended Four Flat 9thD#7sus4b9
7th Suspended SecondC#7sus2
Dominant 6thE7(6)
Dominant 7th Sharp 9thC#7#9
Dominant 7th Sharp Five Flat 9thD#7#5b9
Dominant 9thC#9
Major 6thEM6
Major 7thEM7
Major 7th Flat ThirteenthEMaj7b13
Major 9thEM9, AM9
Major 9th Flat FifthAMaj9b5
Minor 2ndC#m2
Minor 7thC#m7
Minor 7th Flat ThirteenthG#m7b13, C#m7b13
Minor 9th Flat FifthC#m9b5
Minor Added 11thG#madd11
Minor Added 9thC#madd9
Minor EleventhC#m11
Minor Major 9thC#mMaj9
Minor Six-NineC#m6/9
Six-NineE6/9, B6/9

Associated Scales

This chord can be found in the following scales.

ScaleRoots
DorianF#, C#
Harmonic MinorG#
Ionian #5B
LocrianBb, D#
Locrian ♮6Bb
LydianA, E
Lydian #9E
MajorB, E
MinorG#, C#
MixolydianB, F#
PhrygianG#, D#
Phrygian DominantD#
Super-Locrian bb7G
Ukrainian DorianC#

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