Seventh Chords and Inversions

Introduction

Seventh chords add a fourth note to the triad, creating richer, more complex harmony. Inversions rearrange the notes so different chord tones are in the bass. Together, seventh chords and inversions give your playing sophistication and smooth voice leading.

The Four Main Seventh Chord Types

Dominant Seventh (7)

Root + Major Third + Perfect Fifth + Minor Seventh
- C7: C-E-G-Bb
- Sound: bluesy, tense, wants to resolve.
- Example: G7 resolving to C major in “Twist and Shout.”

Major Seventh (maj7)

Root + Major Third + Perfect Fifth + Major Seventh
- Cmaj7: C-E-G-B
- Sound: warm, lush, sophisticated, jazzy.
- Example: The opening chord of “Don’t Know Why” by Norah Jones.

Minor Seventh (m7)

Root + Minor Third + Perfect Fifth + Minor Seventh
- Cm7: C-Eb-G-Bb
- Sound: mellow, smooth, soulful.
- Example: The verse chords of “So What” by Miles Davis.

Diminished Seventh (dim7)

Root + Minor Third + Diminished Fifth + Diminished Seventh
- Cdim7: C-Eb-Gb-Bbb(A)
- Sound: tense, dramatic, suspenseful.
- Common in classical and film music.

Chord Inversions

Root Position

The root is in the bass.
- Cmaj7 root position: C-E-G-B
- Sound: stable, grounded.

First Inversion

The third is in the bass.
- Cmaj7 first inversion: E-G-B-C
- Sound: lighter, less grounded, more flowing.

Second Inversion

The fifth is in the bass.
- Cmaj7 second inversion: G-B-C-E
- Sound: unstable, wants to resolve, often used as a passing chord.

Third Inversion

The seventh is in the bass.
- Cmaj7 third inversion: B-C-E-G
- Sound: unresolved, wants to move, creates strong pull to the next chord.

Practical Voicings

Shell Voicings

For jazz and contemporary piano, shell voicings use only the root, 3rd, and 7th:
- Cmaj7 shell: C-B-E (root, 7th, 3rd)
- Dm7 shell: D-C-F (root, 7th, 3rd)
- G7 shell: G-F-B (root, 7th, 3rd)

These three-note voicings outline the chord quality clearly and leave space for the right hand to play melody.

Drop 2 Voicings

Drop 2 voicings spread the chord across both hands for a fuller sound:
- Cmaj7 drop 2: G-B-C-E (left hand: G-B, right hand: C-E)

Practice Exercise

1. Play Cmaj7 in root position, 1st, 2nd, and 3rd inversion.
2. Play C7 in all four inversions.
3. Play Cm7 in all four inversions.
4. Play a I-IV-V-I progression using seventh chords in root position.
5. Play the same progression using inversions for smooth voice leading.

Conclusion

Seventh chords and inversions are what separate beginner pianists from intermediate players. They add harmonic color, smooth voice leading, and professional polish to your playing. Start with the four main types, learn their inversions, and watch your music transform.