Because of this it has special name which is “dominant” seven. The V chord, D7, is unique in that it’s a major chord but it has a flat seven interval like the minor chords. If you do this correctly the following sequence should emerge: Now that you have identified the seventh interval for the first two chords in the key of G you can continue the process with the rest of the scale. You use the same chord shape in Led Zeppelin’s “Stairway to Heaven.” You use the same chord shape in Steve Miller Band’s “Serenade.” In the Am7 example, the minor 7th, G, is the open 3rd string. In the Gmaj7 example, the major 7th, F#, is under your first finger on the first string. These neck diagrams illustrate ways to form G major 7th and A minor 7th guitar chords. You’ll have to rearrange your fingers in order to accommodate this extra note. This can be done with any Am chord shape in any position, and any G note regardless of the octave. When you add a G note to an Am chord you create an A minor seven chord (or Am7). This interval is called a flat seven because it’s one fret less than a major seven (or two frets shy of an octave). If you do this correctly the seventh note away from A is G. To do this, count the notes of the G major scale STARTING ON A. Next, add a seventh interval to the ii chord in the key of G, A minor. This can be done with any G major chord shape in any position, and any F# note regardless of the octave. Any time you add an F# to a G major chord you create a G major seven chord (or Gmaj7). The F# note is a major seven interval and is just one note shy of an octave. Starting on a G note in the key of G, 1 3 5 7 are G B D F#. All you have to do is repeat the whole process, but this time add an additional interval to the triad. If you’ve already been through the process of building chords for the entire major scale, then you’re ready to start adding chord extensions. Major scale patterns and building chords are two topics that are foundational to understanding and applying chord extensions. Remember, each guitar music theory topic builds on the one before it. You might even need to take a further step back and learn major scale patterns. This would include guitar chord progressions and playing by numbers. Major Scale Patterns and Chord Progressionsīefore you begin to study extensions you should first learn how to build major and minor chords (triads) from the major scale. This free guitar lesson will give you a quick introduction to this topic and how to apply this music theory principal to the fretboard and popular songs. Adding extensions creates more complex chords with richer sounds. Other notes, or extensions, from the major scale can be added to chords such as seconds, fourths, sixths and sevenths (2 4 6 7). These intervals are derived from the major scale and named according to their scale degree. How to Play Minor and Major Seventh Guitar ChordsĪt their core, major and minor chords are built from triads which consist of root, third and fifth (1 3 5) intervals.
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