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C♯ seven sus4 chord

C♯ seven sus4 Suspended family

Hanging in the air before a big resolution.

Easiest shape1 of 5

Square: the root. In colour: the 4th, which gives the chord its sound.

Change a finger and see what it becomes

Built from

C♯root
F♯4th
G♯5th
Bflat 7th

A dominant 7 with its 3rd suspended to the 4th: double the waiting.

Tension: Restless

Hear it in a progression

ii–V–I
The backbone of jazz. In F♯ major.
Capo and transpose
Blues opening
The first four bars of a twelve-bar blues. In D♭ major.
Capo and transpose

Where it goes next

Thinking in F♯ major, where it is the V7 chord.

F♯maj7
Imaj7. The strongest pull in music: tension resolving home.
D♯m7
vi7. The fake-out: you expect home, you get the relative minor.

Sounds close

G♯m7
Shares 3 of its notes. Both have F♯, G♯ and B.
E
Shares 2 of its notes. Both have G♯ and B.
F♯
Shares 2 of its notes. Both have C♯ and F♯.
F♯m
Shares 2 of its notes. Both have C♯ and F♯.

Scales that fit

Notes you can play over this chord, simplest first.

Keys it lives in