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D#6/9 Piano Chord

    Piano Diagram of D#6/9 in Root Position

    D# 6-9 Chord - Root Position - Piano Diagram

    D#6/9 is a five-note chord consisting of the notes D#, Fx, A#, B#, and E#. It is a major chord with an added 6th and 9th. It belongs to the chord family of 6th chords, which are “Added chords”. Keep reading to gain a deeper understanding of the music theory behind this chord.


    Structure of D#6/9


    D#, Fx, A#, B#, E#


    R, 3, 5, 6, 9

    Playing Extended Chords on Piano

    Extended chords are an essential part of piano playing, providing a rich and complex sound. However, playing extended chords can be challenging due to the number of notes involved. One way to manage this is by omitting certain notes, such as the root or the 5th, or by dividing the chord between both hands.

    Despite these techniques, extended chords can still create dense harmonies that require careful voicing. When inverted, these chords can produce complex clusters of notes that need to be approached with skill and precision. Mastering the voicing of extended chords takes time and practice, but it’s a crucial skill for any pianist looking to expand their repertoire.


    D#6/9 Chord Inversions

    The D#6/9 chord has a total of 4 inversions:

    Root Position: D# Fx A# B# E#
    1st Inversion: Fx A# B# D# E#
    2nd Inversion: A# B# D# E# Fx
    3rd Inversion: B# D# E# Fx A#
    4th Inversion: E# Fx A# B# D#


    Piano Keyboard Diagrams

    D#6/9 Chord - Root Position - Piano Diagram

    D#6/9 Chord – Root Position


    Chord Inversion on Piano

    Chord inversions are a foundational concept in music theory, helping to explain how chords are built and how they fit into progressions. However, when we talk about chord inversions on a piano keyboard, it’s important to keep in mind that the diagrams we use to show the notes in an inversion might not always match up with practical playing.

    In practice, pianists use different voicings and fingerings for chords, spreading the notes out across different octaves and positions on the keyboard. This means that the basic shape of a chord’s inversions as shown in diagrams might not always be the most efficient way to play the chord on a piano keyboard.

    So while chord inversion diagrams can help understand the sequence of notes in a chord, they don’t always give us the best way to play the chord on a piano. It’s up to each pianist to experiment with different voicings and find the most comfortable and efficient way to play the chord while still maintaining the intended harmonic function and sound.


    Music Theory and Harmony of D#6/9


    Building the D#6/9 Chord: Different Approaches

    Starting from the D# Major Scale

    To create a 6/9 chord, you can use the Major scale as a reference by combining a Root, a 3rd, a 5th, a 6th, and a 9th.

    In this case, to build a D#6/9 let’s start from the D# Major scale:


    D# Major Diatonic Scale up to 13th

    D# Major Scale


    D# Major Diatonic Scale up to 13th - Keyless Notation

    D# Major Scale – Keyless Notation


    Apply the formula R, 3, 5, 6, 9 to get a D#6/9 chord:

    1. Select the Root note, which is D#.
    2. Pick the 3rd note, which is Fx (“F double sharp”, equivalent to a natural G), and add it to the chord.
    3. Add the 5th note, which is A#, and include it as well.
    4. Now, add the 6th which is B# (C).
    5. Lastly, include the 9th note of the D# Major scale, which is an E# (F).


    by Combining Intervals

    To build a 6/9 chord, one approach is to combine specific intervals, namely a major 3rd, a minor 3rd, a major 2nd (whole-tone), and a major 3rd.

    3 + m3 + 2  + 3 = 6/9 Chords

    When constructing a D#6/9 chord, you can see that

    • D#-Fx forms a major 3rd,
    • Fx-A# creates a minor 3rd,
    • A#-B# makes a whole-tone interval, and
    • C#-E# is a major 3rd.

    Stacking these intervals together creates a D#6/9 chord.


    How to Use D# 6/9 in a Chord Progression


    Since 6/9th chords are based on major triads with a sixth and a ninth added, they can substitute the major chords built on the scale of the root. This means that we can use the D#6/9 chord in those positions on the scale where the harmonization makes a major chord.

    In some cases, a 6/9 chord can be used as a dominant chord, but it is less common than its use as a tonic or subdominant chord.

    The following tables illustrate the harmonization of scales that contain a D# Maj7 or a D#7 chord.

    on Major Scales

    In this case, the D# Maj7 or D#7 chords are found solely in theoretical major keys. Consequently, it is more practical to reference their enharmonic equivalent keys.

    Major Scales I ii iii IV V vi vii
    D# = Eb Eb Maj7 ⇒ Eb6/9 = D#6/9 F min7 G min7 Ab Maj7 Bb7 C min7 Dm7b5
    A# = Bb Bb Maj7 C min7 D min7 Eb Maj7 ⇒ Eb6/9 = D#6/9 F7 G min7 Am7b5
    G# = Ab Ab Maj7 Bb min7 C min7 Db Maj7 Eb7 ⇒ Eb6/9 = D#6/9 F min7 Gm7b5
    • Tonic chord in Eb Major as Eb6/9
    • Subdominant chord in Bb Major as Eb6/9
    • Dominant chord in Ab Major as Eb6/9 (less common)

    on Natural minor Scales

    As before, we will refer to the equivalent keys as the D# Maj7 or D#7 chords are present exclusively in theoretical minor keys.

    Minor Scales i ii III iv v VI VII
    B# = C C min7 Dm7b5 Eb Maj7 ⇒ Eb6/9 F min7 G min7 Ab Maj7 Bb7
    Fx = G G min7 Am7b5 Bb Maj7 C min7 D min7 Eb Maj7 ⇒ Eb6/9 F7
    E# = F F min7 Gm7b5 Ab Maj7 Bb min7 C min7 Db Maj7 Eb7 ⇒ Eb6/9
    • Mediant chord in C minor as Eb6/9
    • Submediant chord in G minor as Eb6/9
    • Dominant chord in F minor as Eb6/9 (less common)


    D#6/9 in D# Major

    Check Eb6/9 in Eb Major


    D#6/9 in A# Major

    Check Eb6/9 in Bb Major


    D#6/9 Chord in G# Major

    Check Eb6/9 in Ab Major


    D#6/9 in B# minor

    Check Eb6/9 in C minor


    D#6/9 in Fx minor

    Check Eb6/9 in G minor


    D#6/9 in E# minor

    Check Eb6/9 in F minor



    Alternative Names for D#6/9

    • D# 6/9
    • D# 6(9)
    • Re# 6/9
    • D# 6/9th
    • D# add6/9



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