A diminished seventh chord is a diminished triad (which has a root note, a minor third, and a diminished fifth) with a seventh interval added above the root:
◊ Diminished 7th
A Cdim7 has an added diminished seventh: C – E♭ – G♭ – B♭♭*
◊ Half-Diminished 7th
A Cø has an added minor seventh: C – E♭ – G♭ – B♭
• (also called a “minor seventh flat five”)
◊ Diminished Major 7th
A C°M7 has a major seventh: C – E♭ – G♭ – B
* see double-flat
♫ More Piano Chords:
Cmaj ▪ Cma7 ▪ Cma9 | Cmin ▪ Cm7 ▪ Cm9 | Cdim ▪ C°7 | Caug ▪ C+7 | Csus2 ▪ Csus4
■ Back to Master Chord Index
