C Augmented Fifth Sharp Eleventh added Guitar Chord Charts & Variations
The C augmented sharp eleven chord (C+(#11)) combines C, E, G# and F#, that is the root, major third, raised fifth and sharp eleventh. For lead lines, reach for the C whole-tone scale: it holds each note of the chord, so every chord tone is available.
C+(#11) adds the sharp eleventh to an augmented triad, so it has four notes and no seventh. The sharp eleventh is the note that gives the Lydian mode its character.
The augmented triad underneath is symmetrical, so its three notes divide the octave into three equal parts.
C augmented with sharp 11th guitar chord is also written as C+(#11), Caug(#11), C+#11 or Caug#11.
Notes that compose the C +(#11) chord:
Chord formula for the Augmented Fifth Sharp Eleventh added chord:
Formula: 1 3 #5 #11
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Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
What notes are in C+(#11)?
C+(#11) is spelled C, E, G# and F#. That makes a root, a major third, a raised fifth and a sharp eleventh. It has four notes and no seventh.
What is the sharp eleventh in C augmented sharp eleven?
It is the F#, the eleventh note of the scale raised by a semitone. The F# lies six semitones from the C, a tritone, so it adds an edgy, floating colour to the augmented triad.
How is C+(#11) different from a plain C augmented chord?
A plain augmented chord holds only C, E and G#. C+(#11) keeps those three notes and adds F# on top, which gives a fourth, brighter colour.
Which scale fits C augmented sharp eleven?
The C Whole-Tone Scale (C, D, E, F#, G#, Bb) contains all four notes: C, E, G# and F#. You can improvise over the chord without leaving the scale.
