A major ninth chord is a five-note chord that contains an added ninth interval:
◊ Dominant 9th
An A♭9 includes a minor seventh and a major ninth: A♭ – C – E♭ – G♭ – B♭
◊ Major 9th
An A♭maj9 has a major seventh and a major ninth: A♭ – C – E♭ – G – B♭
◊ Add9
An A♭ADD9 is an A♭ major triad with an added major ninth interval (no seventh): A♭ – C – E♭ – B♭
♫ More Piano Chords:
Abmaj ▪ Abma7 ▪ Abma9 | Abmin ▪ Abm7 ▪ Abm9 | Abdim ▪ Ab°7 | Abaug ▪ Ab+7 | Absus2 ▪ Absus4
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