A major ninth chord is a five-note chord that contains an added ninth interval:
◊ Dominant 9th
A C♯9 includes a minor seventh and a major ninth: C♯ – E♯ – G♯ – B – D♯
◊ Major 9th
A C♯maj9 has a major seventh and a major ninth: C♯ – E♯ – G♯ – B♯ – D♯
◊ Add9
A C♯ADD9 is a C♯ major triad with an added major ninth interval (no seventh): C♯ – E♯ – G♯ – D♯
♫ More Piano Chords:
C#maj ▪ C#ma7 ▪ C#ma9 | C#min ▪ C#m7 ▪ C#m9 | C#dim ▪ C#°7 | C#aug ▪ C#+7 | C#sus2 ▪ C#sus4
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