How to play C#7#9: a dominant 7th sharp 9 (the Hendrix chord) built on C#, with 1 voicing, the notes, the keys it belongs to, and songs that use it.
The first diagram is a common voicing: played at the first few frets. An X above a string means don't play it; an O means play it open.
Frets from the low E string to the high E string: x 4 2 4 x 1 (x = not played).
| Note | C# | E# | B | Dx |
|---|---|---|---|---|
| Interval | R | 3 | b7 | #9 |
C#7#9 is a dominant 7th sharp 9 (the Hendrix chord) with C# as its root. The full theoretical spelling is C#, E#, G#, B, Dx. This voicing omits the 5th, the tone guitarists drop first when fitting a chord onto six strings.
C#7#9 is not a diatonic chord in any major or minor key: it turns up as a borrowed chord, a passing chord or an altered dominant, which is part of its color.
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C#7#9 is spelled C#, E#, G#, B, Dx: the root, 3rd, 5th, flat 7th, sharp 9th. The common guitar voicing sounds C#, E#, B, Dx, leaving out the 5th.
Frets from the low E string to the high E string: x 4 2 4 x 1 (x means the string is not played). Fret the high E string at the 1st fret. Add the D string at the 2nd fret. Add the A and G strings at the 4th fret. Strum from the A string down, skipping the B string; the low E string stays silent.
C#7#9 is not a diatonic chord in any major or minor key: it turns up as a borrowed chord, a passing chord or an altered dominant, which is part of its color.
