Bass · seventh
C7 Chord on Bass
C Dominant 7th is C, E, G, Bb — the 1-3-5-b7 pattern of a seventh chord. Here is the shape, the audio, and what usually goes wrong.
There is no open C7 on bass — the single shape below is a barre, which is exactly why this chord trips people up. Take it slowly and check every string.
Start here — Root-3-5-b7 Shape (8th fret)
Barre at fret 8 — the same movable idea, further up the neck: brighter, more compact, and easier to reach if you are already playing up there.
What beginners get wrong
Moving in and out of it
The shape above: Root-3-5-b7 Shape (8th fret) — barred at fret 8.
Listening: each shape above has its own play button, and each one plays the notes that shape actually produces — not a generic triad.
Songs that turn on this chord
- Sweet Home ChicagoRobert Johnsonverse — IV chord
- Pride and JoyStevie Ray Vaughanverse — IV chord
C7 on other instruments
Same notes, different hands. Every link below is a real page with diagrams and audio.
Chords next door
Same root, different colour — and all of them playable on bass.
C7 on Bass — questions people ask
What is the easiest way to play C7 on bass?
“Root-3-5-b7 Shape (8th fret)” — which we rate intermediate — is the easiest C7 shape on bass. Barre at fret 8 — the same movable idea, further up the neck: brighter, more compact, and easier to reach if you are already playing up there. There is no open C7 on bass, so a barre is unavoidable; this is the least demanding one.
What notes are in the C Dominant 7th chord?
C Dominant 7th is C, E, G, Bb — the 1-3-5-b7 interval pattern of a seventh chord. Every voicing on this page uses those notes and nothing else; they just appear in a different order and octave.
What can I play instead of C7?
The nearest stand-ins on bass that keep the same root are Csus4, Csus2, C. They keep the root and the fifth and only change what sits in the middle, so most songs still work — but check the swap against the melody, because the note you removed may be the one the tune is singing.
Can I play C7 on other instruments?
Yes. C7 is the same set of notes everywhere; only the fingering changes. This site has diagrams and audio for it on guitar, piano, ukulele, mandolin, banjo.
Learn the theory behind C7
The shape gets your fingers there. These explain why it sounds the way it does.