C# Major 9th (C#maj9)
Also written as Db Major 9th (Db and C# are the same key).
Notes in C# Major 9th
Inversions
Same notes as C# Major 9th, with a different chord tone as the lowest note. Useful for smoother movement between chords instead of jumping around the keyboard.
Root position
C# in the bass
1st inversion
E# in the bass
2nd inversion
G# in the bass
3rd inversion
B# in the bass
4th inversion
D# in the bass
Open voicings
A close-position chord like C# Major 9th can sound cluttered in the middle of the keyboard. Jazz players open it up by dropping one note down an octave, spreading the same notes wider without changing the chord.
Drop 2
B# on the bottom
Drop 3
G# on the bottom
Play C#, E#, G#, B# and D# together and you get C# Major 9th.
A major seventh chord with a ninth stacked above it, lush and warm with almost no built-in tension. It's a favorite opening or closing chord in jazz and neo-soul, prized for sounding sophisticated while still feeling completely at rest.