The dominant seventh chord (symbol is 7) includes all of the notes of a major triad (root, major 3rd, perfect 5th, and adds a minor 7th. Example: the G 7 chord symbol specifies a chord whose root is G which uses notes drawn from the B (minor 3rd), D (perfect 5th) and F (minor 7th) pitch classes. Listen to four different voicings of the C7 chord. Listen to four different voicings of the C7 chord