C#aug9

C#aug9 is C#, E#, A, B and D#, a augmented ninth. The shape this page opens on is written 121221, lowest string first.

Also written C#9#5, C#+9 or C#9(#5). The same chord either way; which spelling you meet depends on who wrote the chart.

There are 9 common shapes for C#aug9 on the guitar, and 18 derived voicings in 2 families.

The common shapes, written lowest string first: 121221, x43445, 767667, 98780x, 9-8-9-8-10-x, 9-12-9-10-0-11, 9-x-9-10-10-11, x-x-9-10-10-11, 13-14-13-14-14-13.

Shell. Root, third and seventh: the guide tones fix the quality, so the fifth is dropped. That is what leaves a string free, so pick a tension to put on top. C#aug9 has x4344x, 9898xx, x-x-11-10-12-11, x4x465, 9-x-9-10-10-x.

Rootless. The root left to the bass player. Frees a finger for a tension. C#aug9 has xx1201, x2324x, xx3445, xx7867, x-8-9-8-10-x, x-x-9-10-10-11, x-x-13-14-12-13, x2x241.

Tensions. A shell of C#aug9, root, third and seventh, leaves a string free, and the tones that belong over it are the #11 (F##).

The common shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.