Hi,
An Augmented 11th is kind of like a flat 5 chord....but it's voicing buildup is the key.(#5 = flat 4) same thing almost.
Caug11 consists of the root C,3rd,5th,7th,9th,11th flated of course.
In the key of C play this,I'm not great at Tab but....
I believe you type string then fret correct?
6/3 5/3 4/2 3/3 2/3 1/2
Notes would be G,C,E,Bflat,D,F#
The Little River band also used that chord in the song Reminiscing.
Has a wonderful haunting sound.
<img src="images/smiley_icons/icon_biggrin.gif" border=0 alt="Very Happy">