1,008 guitar chords with several shapes each, finger numbers, difficulty and real sound, in any tuning.
C7 is a dominant seventh chord made of 4 notes: C, E, G, B♭. It sounds restless; it wants to move on, usually to the chord a fifth below, and you hear it in blues, rock and roll, and the V chord that pulls a song back home. It is the V chord of F major and turns up in 2 other keys.
The library above opens on C7 with 14 shapes up and down the neck, starting with hand-checked ones. Tap a shape to hear it, or play it one string at a time.
| Note | Degree | Interval from C | Semitones |
|---|---|---|---|
| C | 1 | root | 0 |
| E | 3 | major third | 4 |
| G | 5 | perfect fifth | 7 |
| B♭ | ♭7 | minor seventh | 10 |
Formula: 1 – 3 – 5 – ♭7. On guitar the 5th is often left out of the bigger shapes without changing the chord.
x32310x353538(10)8988x323xxxxx556878xxxThe open position shape is the one to learn first. Once it is easy, try the shape at the 8th fret (8(10)8988): the same chord, higher and brighter, handy when the chords before and after it sit up the neck.
C7 belongs to 3 keys: V in F major, VII in D minor, V7 in F minor. In F major, try I–V–vi–IV: F – C7 – Dm – B♭.
C, E, G, B♭: the root, major third, fifth, minor seventh.
Open position: x32310 (low string first), rated Easy.
C7 has B♭ where Cmaj7 has B. C7 sounds restless; it wants to move on, usually to the chord a fifth below; Cmaj7 sounds dreamy, warm and a little wistful.
No. The easiest shape is rated Easy and needs 4 fingers.