What is a C7 Chord?
C7
C7 Dominant 7th
String-by-String
C7 Dominant 7th is a dominant seventh chord combining the root C, major third E, perfect fifth G, and minor seventh A#. It creates tension that wants to resolve, essential in blues and jazz.
Intervals
Notes
Why does C7 sound bluesy and unresolved?
The C7 Dominant 7th chord gets its bluesy and unresolved character from the combination of its root, major 3rd, perfect 5th, minor 7th. The specific intervals between the notes C, E, G, A#create the harmonic tension and color that define this chord's unique sonic signature.
How to use C7?
C7 is commonly used in progressions across many genres. Try substituting it where you would normally play a standard C chord for added harmonic interest. It pairs well with other chords in the key of C and can serve as both a foundation and a color chord depending on the context.