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Green Belt: Level 4 Guitar Lessons |
7th Chords: More Stacked 3rds |
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Again, remember that music is not in the notes, it's in the space between notes. Any combination of three major or minor 3rds stacked atop one another makes what we hear as some kind of 7th chord. In all the sections below, there are two sets of chords, the first shows the notes in sequential order from the root or 1st degree to the 7th degree, which constitutes quite a stretch on the guitar, but it is important to help develop the qualities of the chords in the ear. The second set of chords in each section are a little tighter on the guitar neck, because we rearrange the order of the degrees, but the chord quality is the same overall, even though the voicing is different. Memorize both by sound and by position! Major 7th ChordThe formula for a major 7th chord is 1 - M3 - 5 - M7, which is really a major 3rd interval with a minor 3rd then another major 3rd stacked on top. The function of the major 7th chord in the harmonic scale is a I or IV chord. ------ ------ ------ Here are guitar-friendly versions of the same chords. ------ ------ ------ Dominant 7th ChordThe formula for a dominant 7th chord is 1 - M3 - 5 - m7, which is really a major 3rd interval with two minor 3rds stacked on top. The function of the dominant 7th chord in the harmonic scale is a V chord. ------ ------ ------ Here are guitar-friendly versions of the same chords. ------ ------ ------ Minor 7th ChordThe formula for a minor 7th chord is 1 - m3 - 5 - m7, which is really a minor 3rd interval with a major 3rd followed by another minor 3rd stacked on top. The function of the minor 7th chord in the harmonic scale is a II, III or VI chord. ------ ------ ------ Here are guitar-friendly versions of the same chords. ------ ------ ------ Half Diminished 7th ChordThe formula for a half-diminished 7th chord is 1 - m3 - b5 - m7, which is really a minor 3rd interval with a major 3rd followed by minor 3rd stacked on top. The function of the half-diminished 7th chord in the harmonic scale is a VII chord. ------ ------ ------ Here are guitar-friendly versions of the same chords. ------ ------ ------ Diminished 7th ChordThe formula for a minor 7th chord is 1 - m3 - b5 - bb7, which is really 3 minor 3rds intervals stacked atop one another. The diminished 7th chord is not part of the harmonic scale, but it is an interesting chord because of its symmetry. This means that no matter how you stack it, the quality of the sound is the same. Try playing the chord up and down the neck 3 frets apart, and you'll probably recognize it from some classical pieces. ------ ------ ------ Here are guitar-friendly versions of the same chords. ------ ------ ------ |
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