To play the Baug chord, place the middle finger on the 3rd fret of the C-string, ring finger on the 3rd fret of the E-string, and index finger on the 2nd fret of the bottom A-string. Let the other string ring open.
The Baug chord contains the notes B-D#-F##.
Yes, you read that right – "F##" – pronounced "F double sharp" which is the enharmonic equivalent of G, meaning F## = G.
Here's how it works:
To build a Baug chord, take the augmented triad formula (1-3-#5) and apply it to the B major scale (B, C#, D#, E, F#, G#, A#).
Identify the first, third, and fifth scale degrees in a B major scale which are B-D#-F#.
Because the fifth scale degree is a "#5" (said "sharp five") raise the F# note a half step to F## making the chord augmented with the notes B-D#-F##, also known as B#-D#-G.
Note: The reason we use a double sharp here is because music theory rules dictate that each scale degree be represented by a different letter, which is the reason we identify the fifth scale degree as F#. So in this case, to make an augmented chord, we must raise the fifth scale degree of the chord "F#" up a half step to "F##", which is the enharmonic equivalent of "G".
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