A minor seventh chord is a minor triad chord with an added seventh interval above the root:
◊ Minor 7th
A B♯min7 has an added minor seventh: B♯ – D♯ – Fx* – A♯
◊ Minor/Major 7th
A B♯m/M7 has an added major seventh: B♯ – D♯ – Fx – Ax
◊ Minor 7th Flat Five**
A B♯m7♭5 is a B♯min7 with a diminished fifth: B♯ – D♯ – F♯ – A♯
* see double-sharp
** also called a half-diminished seventh chord
♫ More Bass 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
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