Dominant 7th Chords

What is a Dominant 7th Chord?

A Dominant 7th chord is a major triad containing only a root, its major third and its perfect fifth (I, III, V) with the addition of a minor seventh (vii) as shown in the schematic above.

There can be multiple versions of each of these notes by fretting the same note on different strings. Sometimes the same note is repeated, other times the note is duplicated one octave higher. In each case, though, the character of the chord is preserved.
Open String Dominant 7th Chords

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