Voicing of Augmented Triad

Doubled Root

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Left hand
C3E3G#3C4
Family
Triads

The Doubled Root voicing of Caug stacks C, E, G# and C from the bottom up: the root, major 3rd, sharp 5th and root of the chord.

It's one of the Triads voicings. The others for Caug are Root Inversion, 1st Inversion and 2nd Inversion.