Aaug7 Ukulele Chord Explanation
The Aaug7 chord contains the notes A-C#-E#-G.
To build a Aaug7 chord, take the augmented seventh chord formula (1-3-#5-b7) and apply it to the A major scale (A, B, C#, D, E, F#, G#).
Identify the first, third, fifth, and seventh scale degrees in a A major scale which are A-C#-E-G#.
Raise the fifth scale degree a half step and lower the seventh scale degree a half step in accordance with the augmented seventh chord formula, which results in the notes A-C#-E#-G for the Aaug7 chord.
Note: E# is the enharmonic equivalent of F but music theory rules dictate the fifth scale degree is represented by a single letter – in this case, "E" which is why we refer to it as an E# in the case of the Aaug7 chord.
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