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A# Maj7 Piano Chord

    Piano Diagram of A# Maj7 in Root Position

    A# Maj7 Chord - Root Position - Piano Diagram

    A# Maj7 is essentially a major triad based on the key of A-sharp, with an additional major 7th (Gx). A# Maj7 can be found on the first and fourth degrees in major keys, and on the third and sixth in minor keys. Keep reading to get a better grip on the music theory behind this chord.


    Structure of A# Maj7


    A#, Cx, E#, Gx


    R, 3, 5, 7


    Fingers Position

    Left Hand

    5, 3, 2, 1

    Right Hand

    1, 2, 3, 5


    A# Maj7 Chord Inversions


    The A# Maj7 chord has a total of 3 inversions:

    Root Position: A# Cx E# Gx
    1st Inversion: Cx E# Gx A#
    2nd Inversion: E# Gx A# Cx
    3rd Inversion: Gx A# Cx E#

     Piano Keyboard Diagrams


    Music Theory and Harmony of A# Maj7


    What are Major 7th Chords?

    A major seventh chord is a type of chord that consists of a major triad with an additional major seventh interval. It can be found as “maj7,” “M7,” or “Δ”. Maj7 chords have a lush and dreamy sound and can be used as substitutes for tonic and subdominant chords in major keys.


    Building the A# Maj7 Chord: Different Approaches


    Starting from the A# Major Scale:

    To build a major 7th chord, you can use the major scale as a reference. You will need to combine a Root, a major 3rd, a 5th interval, and a major 7th.

    For instance, to build the A# Maj7 chord, you can start with the A# Major scale, which consists of A#, B#, Cx, D#, E#, Fx, and Gx.


    A sharp Major Diatonic Scale up to octave

    A# Major Scale


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

    Keyless notation of A# Major scale.


    To form an A# Maj7 chord, use the formula R, 3, 5, 7 as follows:

    1. Start with the Root note, A#.
    2. Choose the major 3rd interval, Cx (“C double sharp”, which is equivalent to D but we call it Cx to preserve the basic interval structure of the chord.)
    3. Add the 5th interval, which is E# (F).
    4. Lastly, include the major 7th interval, Gx (A).

    By using this straightforward formula, you can produce a major 7th chord from any major scale.


    by Combining Intervals:

    One method to create a major 7th chord is by combining specific intervals – a major 3rd, a minor 3rd, and again a major 3rd. To illustrate, let’s use the A# Maj7 chord as an example.

    3 + m3 + 3 = Major 7th Chords

    By examining the intervals between the notes, we can see that A#-Cx forms a major 3rd interval, Cx-E# creates a minor 3rd interval, and E#-Gx is also a major 3rd. These three intervals can be stacked together to create the A# Maj7 chord.


    How to Use A# Maj7 in a Chord Progression


    These tables display the harmonized major and natural minor scales where you can find an A# Maj7 chord as its enharmonic equivalent, Bb Maj7.

    In major scales, A# Maj7 functions as the tonic chord in the key of A-sharp and as the subdominant chord in the key of E# major. In minor scales, it serves as the mediant chord in the key of Fx and as the submediant chord in the key of Cx. However, it’s important to note that these keys are considered theoretical and not commonly used due to their high number of accidentals. It is often more practical to refer to their enharmonic equivalent keys, which have fewer accidentals.

    on Major Scales

    Major Scales I ii iii IV V vi vii
    A# = Bb Bb Maj7 = A# Maj7 C min7 D min7 Eb Maj7 F7 G min7 Am7b5
    E# = F F Maj7 G min7 A min7 Bb Maj7 = A# Maj7 C7 D min7 Em7b5
    • Tonic chord in Bb Major as BbMaj7
    • Subdominant chord in F Major as BbMaj7


    on Natural minor Scales

    Minor Scales i ii III iv v VI VII
    Fx = G G min7 Am7b5 Bb Maj7 = A# Maj7 C min7 D min7 Eb Maj7 F7
    Cx = D D min7 Em7b5 F Maj7 G min7 A min7 Bb Maj7 = A# Maj7 C7
    • Mediant chord in G minor as BbMaj7
    • Submediant chord in D minor as BbMaj7


    A# Maj7 as the Tonic Chord in A# Major

    Check BbMaj7 in Bb Major


    A# Maj7 as Subdominant Chord in E# Major

    Check BbMaj7 in F Major


    A# Maj7 as the Mediant Chord in Fx Minor

    Check BbMaj7 in G minor


    A# Maj7 as the Submediant Chord in Cx Minor

    Check BbMaj7 in D minor


    Alternative Names for A# Maj7 Chord

    • A#j7
    • A#∆
    • A#Δ7
    • La#∆
    • La#7+
    • A#M7
    • A#Ma7
    • A# Maj7
    • A# Major 7
    • La# Magg7

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