Dominant and Altered Dominant 7th chords

Dominant and Altered Dominant 7th chords


Dominant and altered dominant chords can be derived from the Major scale, Harmonic Minor scale, or the Melodic Minor scale. It all comes down to dominant chord tones that are diatonic to the key. These would be considered dominant chords with extensions as opposed to notes outside the diatonic structure, which would be altered dominant chords.


For example:

 

Major Key,
A     C#     E      G      =  A Dominant chord                 A7
B     D      F#            =  Diatonic dominant extensions   = A9th, A11th, A13th  
Bb    C      Eb     F      =  Altered dominant chords        = A7b9, A7#9, A7b5, A7#5
Harmonic Minor Key,
A     C#     E      G      =  A Dominant chord                 A7
Bb    D      F#            =  Diatonic dominant extensions   = A7b9, A11th, A7#5   
B     C      Eb     F      =  Altered dominant chords        = A9th, A7#9, A7b5, A7#5
Melodic Minor Key,   IV Chord
A    C#    E     G    =  A Dominant chord                  A7
B    D#    F#         =  Diatonic dominant extensions   =  A9th, A7#11, A13th  
Bb   C     D     F    =  Altered dominant chords        =  A7b9, A7#9, A11th, A7#5
Melodic Minor Key,   IV Chord
A    C#     E    G      =  A Dominant chord                A7
B    D      F           =  Diatonic dominant extensions  = A9th, A11th, A7#5
Bb   C      Eb   F#     =  Altered dominant chords       = A7b9, A7#9, A7b5, A13th


In the video below I will demonstrate the A7 chord using diatonic and non diatonic extensions.
As always keep practicing and enjoy.


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Dominant and Altered Dominant 7th chords

Dominant 7th and Altered 7th Chord Grid

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