Dom7 Shell
Root + 3rd + ♭7
Prove it — just do the practice exercise.
C7 Shell Voicing
C (R)E (3)Bb (♭7)
In the dominant shell, only the seventh changes:
• Root
• Major 3rd — same as Maj7
• Minor 7th — one semitone lower than Maj7
Example: C7 Shell = C + E + Bb
Remember: The 3rd stays the same, only the 7th moves.
• Root
• Major 3rd — same as Maj7
• Minor 7th — one semitone lower than Maj7
Example: C7 Shell = C + E + Bb
Remember: The 3rd stays the same, only the 7th moves.