C C♯/D♭ D D♯/E♭ E F F♯/G♭ G G♯/A♭ A A♯/B♭ B
Major (Ionian mode) Dorian mode Phygian mode Lydian mode Mixolydian mode Minor (Aeolian mode) Locrian Harmonic Minor
C♯ dominant ninth (C♯, F, G♯, B, D♯)
How to play a C♯ dominant ninth on the guitar at fret 3
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