Added tone chord

An added tone chord is a non-tertian chord composed of a tertian triad and an extra "added" note. The added note is not a seventh (three thirds from the chord root), but typically a non-tertian note, which cannot be defined by a sequence of thirds from the root, such as the added sixth ( Play ) or fourth. This includes chords with an added thirteenth (a tertian note, six thirds from the root) and farther "extensions", but that do not include the intervening tertian notes as in an extended chord. The concept of added tones is further convenient in that all notes may be related to familiar chords.

An added sixth chord ends songs including Hank Williams' "Hey Good Lookin'",Chuck Berry's "Rock and Roll Music",Sam Cooke's "You Send Me", and The Beatles' "She Loves You" (Paul on 8, George on 6, John on 5). Though the added sixth chord is rarely found inverted, examples include The 5th Dimension's recorded version of "Stoned Soul Picnic" (on 5).

The thirds in a mixed third chord, also split-third chord, a chord which includes as its third both the major and minor third (for a chord on C: C E♭ E(♮) G), are usually separated by an octave or more. While a minor chord placed over a major chord of the same root (creating a tension of ♯9) is somewhat common, a major chord placed over a minor chord of the same root (creating a tension of ♭9) is not as commonplace. Examples of use of the split-third chord include "Rock And Roll Music", Paul McCartney's "Maybe I'm Amazed", and Jimi Hendrix Experience's "Purple Haze" (Dominant seventh sharp ninth chord). Tonic dominant seventh chord with split third include Heatwave's "Boogie Nights". It is "suggested" by the final note and chord of "A Hard Day's Night".