C 7add13 Chord on 8-String Guitar
Play C 7add13 on 8-String Guitar: diagrams, finger positions, intervals, and every voicing up and down the neck for this instrument.
The C 7add13 chord is an extended or altered dominant that stacks ninths, elevenths, thirteenths, or chromatic tensions over a dominant-seventh core. It is built from the notes C, E, G, A, A#. This page shows how to play C 7add13 on 8-String Guitar with clear fretboard diagrams and suggested finger positions.
There is no open-string version on 8-String Guitar: the lowest shape barres fret 8 and covers 3 frets. The F# and B strings stay silent, so 6 of 8 sound. C falls on the E string. It sounds from C3 up to C5.
8-String Guitar is tuned F#–B–E–A–D–G–B–E, with 15 frets to work with.
Browse alternate voicings to find the one that sits best under your fingers, then compare it with the other chord types built on C or explore the same shape in nearby keys. The diagrams list the notes in each voicing so you can connect the shape to the theory behind it.