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♯ diminished seventh chord (C♯, E, G, A♯)
How to play a C♯ diminished seventh chord on the guitar at fret 1
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