Bb dim Piano Chord

Structure of Bb dim

 

Fingers Position

Starting from a Major Scale

To build a diminished chord, you begin by selecting the root note, the 3rd note, and the 5th note of the major scale. Next, you lower the 3rd and the 5th note by one half-step.

 

 

 

So, if you want to build a Bb diminished chord, you would start with the Bb major chord, which consists of the notes Bb, D, and F. Then, you would lower the third note, D, by one half-step to get Db and lower the fifth note, F, by one more half-step to get Fb (E). The resulting notes, Bb, Db, and Fb form the Bb diminished chord.

 

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by Combining 3rds

Alternatively, a diminished chord can be built by stacking two minor 3rd intervals on top of each other. To get this chord, you begin with the root note and then raise it by a minor 3rd. Next, you raise the third note by another minor 3rd. The resulting chord will consist of three notes that are spaced an equal distance apart.

m3 + m3 = diminished Chords

To form a Bb dim chord, you start with the root note Bb and raise it by a minor 3rd to Db. Then, you raise the third note Db by another minor 3rd to Fb. This results in a Bb dim chord consisting of the notes Bb, Db, and Fb.

 

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How to Use Bb dim in a Chord Progression

 

Harmonic functions describe how chords sound together in a specific key and context. In Western music, there are seven main harmonic functions, one for each note of the diatonic scale. Major chords are represented by capitalized Roman numerals, while minor chords are represented by lowercase ones.

The tables below show the Ab minor scale and its relative major scale, both of which include a Bb diminished chord.

The Bb diminished chord is found on the second scale degree (II) in the Ab minor scale and on the seventh scale degree (VII) in the Cb major scale. However, for a more comprehensive list of its uses, please refer to the dim7 tables, where I delve deeper into some of the features of these chords.

 

on Natural minor Scale

• Supertonic chord in A minor

 

on Major Scale

• Leading tone chord in Cb Major

 

A-flat minor and C-flat major are uncommon keys, therefore, musicians often use their enharmonic equivalent keys, G#minor and B major, which have fewer accidentals, making them easier to read and play.

 

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Bb dim Chord Function in Major and Minor Keys

Understanding Scale Degrees

When we create chords from a scale, each note in the scale is given a specific degree that reflects its position in the scale. In the diatonic major scale, there are seven degrees, and each degree plays a unique role in the overall harmony of the scale.

1. The first degree of the scale is called the Tonic, and it’s like the home base of the music. It provides a stable tonal center that serves as the foundation for the scale.
2. The second degree of the scale is called the Supertonic. It’s often used as a transitional note between the tonic and other notes in the scale.
3. The third degree of the scale is called the Mediant. It’s located halfway between the tonic and dominant notes and helps to establish whether the scale is major or minor.
4. The fourth degree of the scale is called the Subdominant. It’s often used as a complementary harmony to the dominant.
5. The fifth degree of the scale is called the Dominant. It generates tension and a sense of expectation, and it’s usually resolved by returning to the tonic.
6. The sixth degree of the scale is called the Submediant. It’s often used as a transition between the dominant and tonic, and it provides a sense of stability and restfulness to the music.
7. The seventh degree of the scale is called the Leading tone. It’s located one half step below the tonic and produces a strong sense of tension and a desire to resolve to the first degree.

 

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Bb dim in Ab Minor

 In the key of Ab minor, the Bb diminished chord serves as the supertonic chord, which is the chord built on the second degree of the scale. It is often used as a passing chord to create movement between other chords in a progression.

 

Bb dim Chord Progressions as ii degree

Here are some examples of chord progressions that feature the Bb diminished as the supertonic chord.

ii iv V i

In minor keys, the fifth degree (v) is often replaced with a dominant 7th chord (V⁷) or a major chord (V) in the context of triads. This chord is derived from the harmonic minor scale and is commonly used in this position.

 

iv ii i

 

VII ii i

ii V i

 

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Bb dim in Cb Major

Check A# dim in B Major

 

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Alternative Names for Bb Diminished

• Bb°
• Bbdim
• Bb diminished
• B-flat diminished

 

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