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C♯maj9 Chord: Guitar, Piano and Notes

The C♯maj9 chord is a major ninth chord built on the root note C♯. Its notes are C♯, E♯, G♯, B♯ and D♯. It's enharmonically the same chord as D♭maj9.

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Short answer

Major ninth chords are lush and floating. A major seventh chord with a ninth added, they are one of the sweetest sounds in jazz and neo-soul, warm enough to sit still on for a whole bar.

Notes
C♯ · E♯ · G♯ · B♯ · D♯
Formula
1 · 3 · 5 · 7 · 9
Semitones
0 · 4 · 7 · 11 · 14
Note
C♯
Quality
Major 9
Symbol
C♯maj9

C♯maj9 on piano

5 notes
View:
Piano diagram of the C♯maj9 chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

To play C♯maj9 on piano, place your right hand with your thumb on C♯, index finger on E♯, middle finger on G♯, ring finger on B♯ and little finger on D♯. Press the keys together and listen for an even sound. On the keyboard C♯, G♯ and D♯ are black keys and E♯ and B♯ are white, the keys you'd normally call F and C. The thumb starts on a black key, so slide the whole hand a little further in, towards the fallboard. Practice moving in and out of the chord slowly, then bring in a metronome.

  • C♯1
  • E♯3
  • G♯5
  • B♯7
  • D♯9

C♯maj9 on guitar

View:
Guitar chord diagram of the C♯maj9 chord

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.

On guitar, C♯maj9 is commonly played with the voicing shown above. This one is a barre at fret 1: keep the index finger flat across the strings and curve the others so they don't mute the strings next to them. Don't play string 6.

C♯ · E♯ · G♯ · B♯ · D♯

Play C♯maj9 on the online piano

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C♯maj9 chord notes

Also known as D♭maj9

DegreeIntervalSemitonesNoteHear
1Root0C♯(C#)
3Major third4E♯(E#)
5Perfect fifth7G♯(G#)
7Major seventh11B♯(B#)
9Major ninth14D♯(D#)

How to use the C♯maj9 chord

The C♯maj9 chord is built from a root, a major third, a perfect fifth, a major seventh and a major ninth. Start at the root C♯ and stack the intervals to get the whole chord: C♯, E♯, G♯, B♯ and D♯. The same formula gives you the chord in any other key.

Major ninth chords work as the I or IV chord where a major seventh would do, adding depth without changing the function. Bossa nova, jazz, soul and R&B treat them as a default tonic sound.

How C♯maj9 differs from similar chords

C♯maj9 stacks a major ninth on C♯maj7, and it differs from C♯9 only in the seventh, a half step higher. Without that major seventh it would be C♯add9. Its upper four notes form the minor seventh chord a major third above the root, which is how pianists often voice it.

Where C♯maj9 is used

A major chord is at home as a tonic, and just as useful as the IV or the V of a neighbouring key. Each progression below is written in the key its numerals name.

As the goal of a ii-V-IC♯ major
  1. ii7D♯m7
  2. V7G♯7
  3. Imaj9C♯maj9

The oldest cadence there is: two chords of preparation, then C♯maj9.

Questions people ask

What notes are in the C♯maj9 chord?
The C♯maj9 chord contains C♯, E♯, G♯, B♯ and D♯ (C#, E#, G#, B# and D# in plain text).
Is the C♯maj9 chord major or minor?
C♯maj9 is a major ninth chord. Major ninth chords are lush and floating. A major seventh chord with a ninth added, they are one of the sweetest sounds in jazz and neo-soul, warm enough to sit still on for a whole bar.
How do you play C♯maj9 on piano?
Place your fingers on C♯, E♯, G♯, B♯ and D♯ and play them together. The root usually goes to the little finger of the left hand, the upper notes to the right. On the keyboard C♯, G♯ and D♯ are black keys and E♯ and B♯ are white, the keys you'd normally call F and C. The thumb starts on a black key, so slide the whole hand a little further in, towards the fallboard.
How do you play C♯maj9 on guitar?
Use the fingering in the diagram above. This one is a barre at fret 1: keep the index finger flat across the strings and curve the others so they don't mute the strings next to them. Don't play string 6.
What is another name for the C♯maj9 chord?
C♯maj9 is enharmonically equivalent to D♭maj9. Both chord names describe exactly the same notes, but the spelling depends on the key you are playing in.