BbmMaj7 Piano Chord

Piano Diagram of BbmMaj7 in Root Position

The BbmMaj7 chord is a minor chord rooted in the key of Bb, consisting of the notes Bb, Db, F, and A. The main feature of this chord is the inclusion of a major 7th interval on a minor chord. Additionally, the presence of an augmented fifth between the minor 3rd and major 7th creates a sense of dissonance. In this article, we will delve into the music theory of the BbmMaj7 chord and its role within chord progressions.

 

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Finger Position

 

BbmMaj7 Chord Inversions

 

The BbmMaj7 chord has a total of 3 inversions:

Piano Keyboard Diagrams

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Music Theory and Harmony of BbmMaj7

 

Building the BbmMaj7 Chord: Different Approaches

Starting from the Bb Major Scale

A Bb minor major 7th chord is formed by taking the root note Bb, adding a minor 3rd interval (Db), a perfect 5th interval (F), and finally a major 7th interval (A). Although these intervals are typically derived from a minor scale, for educational purposes, it is often more intuitive to explain their construction using a major scale.

For example, to build a BbmMaj7 chord, you can start with the Bb Major scale:

 

 

 

To create a BbmMaj7 chord, apply the formula R, m3, 5, 7 in the following manner:

1. Begin with the Root note, which is Bb.
2. Select the minor 3rd interval, Db.
3. Include the 5th note, F.
4. Finally, add the major 7th interval (A), which is the 7th note of the scale.

By following this simple formula, you can create a minor major 7th chord from any major scale.

 

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by Combining Intervals

Another way to form a minor major 7th chord is by combining specific intervals – a minor 3rd, a major 3rd, and another major 3rd.

m3 + 3 + 3 = minor Major 7th chords

If we observe the intervals between the notes, we can notice that:

• Bb-Db creates a minor 3rd interval,
• Db-F forms a major 3rd interval,
• and F-A is another major 3rd interval.

By stacking these three intervals together, we can build the BbmMaj7 chord.

 

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How to Use BbmMaj7 in a Chord Progression

 

The BbmMaj7 chord is characterized by the presence of a major 7th interval, which is not found in either the natural minor or major scales. It’s diatonic in other scales like the harmonic and melodic minor scale, which features a minor major seventh chord on their first degree.

Typically, the BbmMaj7 chord is used as a passing chord, temporarily transitioning towards a more stable Bbm7. Additionally, it can serve as an ending chord in specific musical contexts. This is because the chord produces a mysterious and intriguing atmosphere, making it suitable for certain musical styles and compositions.

Non-diatonic positions in Natural minor and Major Scales

The major seventh interval of the BbmMaj7 chord, which is A, clashes with the Ab note present in both natural minor and major scales. For this reason, the BbmMaj7 chord is not commonly used as a standalone chord (except in endings).

The BbmMaj7 chord is used:

• on the first and fourth degree of minor scales or
• on the second and on the sixth degree of major scales,
• as part of a chromatic progression towards a minor 7th chord.
• While less common, it can still be used on the fifth degree of both minor and major scales.

Here are the tables of the major and natural minor scales that include the Bb minor 7th, which can be complemented by a BbmMaj7 chord.

 

on Natural minor Scales

Non-diatonic passing chord to the:

• Tonic chord in Bb minor
• Subdominant chord in F minor
• Dominant chord in Eb minor (less common)

 

on Major Scales

Non-diatonic passing chord to the:

• Supertonic chord in Ab Major
• Mediant chord in Gb Major
• Submediant chord in Db Major

 

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BbmMaj7 Function in Major and minor Keys

The chord BbmMaj7 does not serve a functional role in harmonic progressions within major and minor keys as it is not diatonic. Rather, it should be considered as a color to add in certain contexts where modulation to a Bbm7 chord is feasible or appropriate.

 

BbmMaj7 as Passing Chord in Bb minor

In the key of Bb minor, the BbmMaj7 serves as a passing chord to the Tonic chord, Bbm7. The chord’s major 7th note, A, clashes with the Ab note found in the Bb minor scale, creating a tension that needs to be resolved. This can be achieved by transitioning the chord to a more stable Bbm7 chord, which typically occurs within the same measure as the BbmMaj7 chord.

Alternatively, the BbmMaj7 chord can be left alone as an ending chord, but it’s too dissonant to be played for a whole measure within a chord progression.

Bbm(Maj7) as Passing Chord on the i degree

The following chord progressions are examples of how the Bb minor major 7th chord can serve as a passing chord towards the tonic chord (Bbm7).

 

Chromatic modulation

 

i VI VII III

 

i iv VI VII

 

Circle Progression

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BbmMaj7 as Passing Chord in F minor

The BbmMaj7 chord can be used as a passing chord in the F minor scale which has a Bb min7 on the fourth degree.

BbmMaj7 as Passing Chord on the iv degree

The following chord progressions feature a BbmMaj7 chord in modulation to the iv degree in the key of F minor:

 

iv III VI VII

 

i iv VI v

 

Circle Progression

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BbmMaj7 as Passing Chord in Eb minor

In the Eb minor scale, the BbmMaj7 chord can serve as a passing chord within the fifth degree, Bbm7.

BbmMaj7 as Passing Chord on the v degree

 

i iv VI v

 

i v VI VII

 

i VI v iv

 

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BbmMaj7 as Passing Chord in Ab Major

In the Ab major scale, the BbmMaj7 chord can also serve as a passing chord on the ii degree.

BbmMaj7 as Passing Chord on the ii degree

 

ii V I

 

Circle Progression

 

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BbmMaj7 as Passing Chord in Gb Major

Another position where it could be possible to add some color modulating a Bbm7 is in the Gb major scale on the iii degree.

BbmMaj7 as Passing Chord on the iii degree

 

I iii IV V

 

I iii ii V

 

I iii vi IV

 

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BbmMaj7 as Passing Chord in Db Major

You can play the BbmMaj7 in a modulation on the sixth degree of the Db major scale.

BbmMaj7 as Passing Chord on the vi degree

 

I iii vi V

 

I vi ii V

 

Circle Progression

 

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Alternative Names for BbmMaj7

• Bb mΔ
• Bb mM
• Bb m7+
• Bb mΔ7
• Bb m(Δ)
• Bb mM7
• Bb minΔ
• Bb m(+7)
• Bb m(Δ7)
• Bb minΔ7
• Bb minorΔ
• Bb m(maj7)
• Bb m(Maj7)
• Bb minMaj7
• Bb min maj7
• Bb m(Maj7th)
• Bb minor major 7th
• Bb minor major seventh

 

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Conclusion

The chord progressions and examples presented in this post provide a comprehensive overview of the most common uses of the BbmMaj7 chord. It’s important to note, however, that there are many advanced harmony-related topics that could not be included due to space constraints. These topics include chord progressions built on harmonic and melodic scales, modal scales, hidden tonality, secondary dominants and other chord substitutions, non-functional harmony and atonal music, modal interchange and borrowed chords, voice leading and counterpoint, chromatisms, jazz harmony…I mean, music theory is a huge topic!

Although I couldn’t cover all of these topics in my post, I encourage readers to continue exploring these areas in their own study and research. By expanding your knowledge in these advanced areas of music theory, you can gain a deeper understanding of the harmonic possibilities that exist beyond the basics presented here.