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 B♯dim7 has an added diminished seventh: B♯ – D♯ – F♯ – A
◊ Half-Diminished 7th
A B♯ø has an added minor seventh: B♯ – D♯ – F♯ – A♯
• (also called a “minor seventh flat five”)
◊ Diminished Major 7th
A B♯°M7 has a major seventh: B♯ – D♯ – F♯ – Ax*
* see double-sharp
♫ More Piano Chords:
B#maj ▪ B#ma7 ▪ B#ma9 | B#min ▪ B#m7 ▪ B#m9 | B#dim ▪ B#°7 | B#aug ▪ B#+7 | B#sus2 ▪ B#sus4
■ Back to Master Chord Index
