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The harmonic and melodic minor scales are essential tools for guitarists seeking to expand their harmonic vocabulary. These scales introduce unique sounds and chord possibilities that are not available within the natural minor scale. Understanding how to construct chords from these scales can greatly enhance improvisation, songwriting, and overall musical expression.
Understanding the Harmonic Minor Scale
The harmonic minor scale is derived from the natural minor scale by raising the seventh degree by a half step. This alteration creates a distinctive interval known as the augmented second between the sixth and seventh degrees, giving the scale a characteristic sound often associated with Middle Eastern and classical music.
The formula for the harmonic minor scale is:
- Whole step
- Half step
- Whole step
- Whole step
- Half step
- Augmented second
- Half step
For example, in A harmonic minor, the notes are:
- A
- B
- C
- D
- E
- F
- G#
Chords Derived from the Harmonic Minor Scale
Chords built from the harmonic minor scale often feature the raised seventh, which creates a leading tone that strongly pulls toward the tonic. This leads to distinctive minor chords and unique dominant chords that are useful in various musical contexts.
Common chords include:
- Minor i chord (e.g., Am in A harmonic minor)
- Major III chord (e.g., C major)
- Augmented V+ chord (e.g., E+)
- Half-diminished ii°7 chord (e.g., Bm7b5)
- V7 chord with raised seventh (e.g., G#7 in A harmonic minor)
Understanding the Melodic Minor Scale
The melodic minor scale differs from the natural minor by raising both the sixth and seventh degrees when ascending. When descending, it typically reverts to the natural minor form. This scale provides a smooth, jazz-influenced sound and offers additional chord options.
The ascending melodic minor scale formula is:
- Whole step
- Half step
- Whole step
- Whole step
- Whole step
- Whole step
- Half step
For example, in A melodic minor ascending, the notes are:
- A
- B
- C
- D
- E
- F#
- G#
Chords from the Melodic Minor Scale
The melodic minor scale allows for a variety of interesting chords, especially in jazz and fusion genres. The raised sixth and seventh degrees create altered chords and sophisticated harmonic colors.
Common chords include:
- Minor i chord (e.g., Am)
- Major II chord (e.g., B major)
- Minor iii chord (e.g., C#m)
- Major VI chord (e.g., F# major)
- Dominant VII7 chord (e.g., G#7)
Applying These Scales in Guitar Playing
To incorporate harmonic and melodic minor scales into your guitar practice, start by learning the scales across the fretboard. Focus on the unique intervals and characteristic notes, such as the raised seventh in harmonic minor and the raised sixth and seventh in melodic minor.
Experiment with constructing chords directly from these scales. Use arpeggios to highlight the distinctive tones and create melodic lines that emphasize the altered notes. This approach will add richness and complexity to your playing.
Conclusion
The harmonic and melodic minor scales open up new harmonic possibilities for guitarists. By mastering their construction and application, you can add expressive depth and sophistication to your music. Whether used in soloing, chord progressions, or composition, these scales are valuable tools for expanding your musical vocabulary.