To play the C#aug7 chord, perform a barre by pressing your index finger on the C-string and E-string on the 1st fret, middle finger on the 2nd fret of the top g-string, and ring finger on the 2nd fret of the bottom A-string.
The Dbaug7 chord, also known as the C#aug7 chord, contains the notes Db-F-A-Cb.
To build a Dbaug7 chord, take the augmented seventh chord formula (1-3-#5-b7) and apply it to the Db major scale (Db, Eb, F, Gb, Ab, Bb, C).
Identify the first, third, sharp fifth, and flat seventh scale degrees in the Db major scale which are Db-F-A-Cb.
Notice the "Cb" is the enharmonic equivalent of a B note.
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