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An interactive reference for guitar chord shapes, voicings and the theory behind them.

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  1. Chords
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  3. C♯
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  5. 7

C♯ dominant 7th (C♯7)

C♯Root
E♯Maj 3
G♯Perf 5
Bmin 7

Bluesy and driving. The backbone of blues and jazz. Creates strong tension that resolves to the tonic (V7→I progression).

Notes
C♯E♯G♯B
Formula
1 · 3 · 5 · ♭7
Type
Seventh chord
03

How to play it

EADGBe21343fr4567

C♯7

C♯ dominant 7th, 1fr

Bass
C♯, the root
Root
C♯
Strings
A D G B e · open
  • C♯Root
  • E♯M3
  • G♯P5
  • Bm7

Up the neck

6 voicings, same four notes

Why a dominant 7th chord sounds the way it does

C♯+4 fretsE♯+3 fretsG♯+3 fretsB

Stacked from 3 intervals. Compare with C♯maj7 →

04

Where to go next

More C♯ chords

Same root, other colours

C♯9C♯13C♯sus4C♯maj7

Chords in the key of D♭

What C♯7 usually sits next to

I · D♭ii · E♭miii · FmIV · G♭V · A♭vi · B♭mvii° · C°

Close relatives

Relatives of D♭ major

  • B♭mRelative minor of D♭ major
  • C♯mParallel minor, lower the 3rd

Other 7 chords

Same quality, every root

C7C♯7D7E♭7E7F7F♯7G7A♭7A7B♭7B7
01

Root

C♯
02

Quality

7

4 notes: a triad plus a 7th. Jazzier, wants to move.

Why a dominant 7th chord sounds the way it does

C♯+4 fretsE♯+3 fretsG♯+3 fretsB

Stacked from 3 intervals. Compare with C♯maj7 →

03

How to play it

EADGBe2134345673fr

C♯7

C♯ dominant 7th, 1fr

Bass
C♯, the root
Root
C♯
Strings
A D G B e · open
  • C♯Root
  • E♯M3
  • G♯P5
  • Bm7

Up the neck

6 voicings, same four notes
04

Where to go next

More C♯ chords

Same root, other colours

C♯9C♯13C♯sus4C♯maj7

Chords in the key of D♭

What C♯7 usually sits next to

I · D♭ii · E♭miii · FmIV · G♭V · A♭vi · B♭mvii° · C°

Close relatives

Relatives of D♭ major

  • B♭mRelative minor of D♭ major
  • C♯mParallel minor, lower the 3rd

Other 7 chords

Same quality, every root

C7C♯7D7E♭7E7F7F♯7G7A♭7A7B♭7B7
C♯ dominant 7th