The Everything® Essential Music Theory Book by Marc Schonbrun

Author:Marc Schonbrun [Schonbrun, Marc]
Language: eng
Format: epub
Publisher: Adams Media

Major Triads with Sevenths

To make a major triad into a seventh chord, there are only two possibilities: a major triad with a major seventh on top, and a major triad with a minor seventh on top. Start with FIGURE 8.3.

FIGURE 8.3 Major triad with major seventh

When you look at that chord, you can see two things: a major triad, D (D–F ♯–A), and an added C ♯. The interval from the root of the chord to the seventh (D to C ♯) is a major seventh. Call this chord a major/major seventh chord for a second because it tells you exactly what you have: a major triad with a major seventh interval added. Now, the rest of the world calls this chord a major seventh, as in D major seventh, or Dmaj7 for short. Many theorists use major/major seventh to be more specific, but if you say D major seventh, you’re saying exactly the same thing. The major seventh chord is found on the first (tonic) and fourth (subdominant) degrees of a harmonized major scale.

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