Chord Naming variations:
C# ninth flat five, C#9b5, C#9(-5), C#9(b5), C#7/9(b5)
Db ninth flat five, Db9b5, Db9(-5), Db9(b5), Db7/9(b5)
This chord is a 7/b5 chord (root, major third, flat five, minor seventh) with added a major 9th.
If you need help for reading these chord diagrams click here
You might also find useful:
This tutorial will show the chords for the most common keys. You can also download a free pdf with the chords constructed on the major scales and the harmonic mìnor scale of all the music keys. Useful to study music theory, chords progressions, modulation..
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