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Shell Voicings

Root–3rd–7th three-note chords for clean comping.

Objective

Play shell voicings (root, 3rd, 7th) for major 7, minor 7, and dominant 7 chords on the top four strings.

Concepts

  • ▸A shell voicing strips a chord down to its three essential tones: root, 3rd, and 7th.
  • ▸The 3rd tells you if the chord is major or minor. The 7th tells you if it is major 7 or dominant 7.
  • ▸Shell voicings leave space for a bassist to cover the low end and a soloist to add melody.
  • ▸Two common shell voicing positions: root on string 6 (or 5), 3rd and 7th above it.
  • ▸Dominant 7 (e.g., G7): G–B–F. Major 7 (e.g., Cmaj7): C–E–B. Minor 7 (e.g., Dm7): D–F–C.

Diagram / Notation

Shell voicings — root on string 5 (A string)

Chord   Root  String layout (D G B e)
Cmaj7    C    --2-- --4-- --5-- --x--  (3rd=E, 7th=B)
C7       C    --2-- --3-- --5-- --x--  (3rd=E, 7th=Bb)
Cm7      C    --1-- --3-- --5-- --x--  (3rd=Eb, 7th=Bb)

Shell voicings — root on string 6 (E string)

Gmaj7    G    --x-- --4-- --3-- --2--  (root=G, 3rd=B, 7th=F#)
G7       G    --x-- --4-- --3-- --1--  (root=G, 3rd=B, 7th=F)
Gm7      G    --x-- --3-- --3-- --1--  (root=G, 3rd=Bb, 7th=F)

Exercises

1.Build the three shell types
  1. 1.On A string root C: play Cmaj7 shell → C7 shell → Cm7 shell back to back.
  2. 2.Name each interval as you play: "root… 3rd… 7th".
  3. 3.Transpose all three types to G (root on string 6) and A (root on string 5).
2.Comp a ii–V–I with shells
  1. 1.Dm7 shell → G7 shell → Cmaj7 shell using the voicings above.
  2. 2.Stay on strings 4–2 (D G B) to keep a consistent register.
  3. 3.Notice how little each finger moves between chords — that is good voice leading.
3.Rhythmic comping
  1. 1.With a backing track at 120 BPM, comp shells using a jazz rhythm: beat 2 and the "and" of 3.
  2. 2.Avoid beats 1 and 4 — leave space for the bassist.
  3. 3.Add a light chord stab on the "and" of 4 occasionally.

Tips

  • 💡Drop the root once you are playing with a bassist — play only 3rd and 7th (even lighter touch).
  • 💡Shell voicings are the foundation for all jazz comping — every extension you add later builds on this.
  • 💡Learn these by root note, not by shape — shapes shift depending on which string the root is on.
  • 💡Record yourself and listen back — shells should sound clear and dry, not muddy.

Sources & Further Study

▶ Video♪ Song◉ Article✦ Lesson
▶YouTube — Jazz shell voicings on guitar↗♪YouTube — "Satin Doll" — Duke Ellington (jazz comping reference)↗◉Wikipedia — Jazz guitar↗
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