Common Chord Formulas:
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Chord
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Example
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Major Chord: 1, 3, 5
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C: C, E, G
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Minor Chord: 1, 3b, 5
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Cm: C, Eb, G
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Major 7 Chord: 1, 3, 5, 7
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Cmaj7: C, E, G, B
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7 Chord: 1, 3, 5, 7b
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C7: C, E, G, Bb
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Minor 7 Chord: 1, 3b, 5, 7b
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Cm7: C, Eb, G, Bb
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Major 9 Chord: 1, 3, 5, 7, 9
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CMaj9: C, E, G, B, D
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9 Chord: 1, 3, 5, 7b, 9
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C9: C, E, G, Bb, D
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Minor 9 Chord: 1, 3b, 5, 7b, 9
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Cm9: C, Eb, G, Bb, D
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6 Chord: 1, 3, 5, 6
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C6: C, E, G, A
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Minor 6 Chord: 1, 3b, 5, 6
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Cm6: C, Eb, G, A
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Sus/Sus4: 1, 4, 5
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Csus/Csus4: C, F, G
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Sus2: 1, 2, [3], 5
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Csus2: C, D, [E], G
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Diminished: 1, 3b, 5b, 6
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C(little circle): C, Eb, Gb, A
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Augmented: 1, 3, 5#
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C+: C, E, G#
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The [3] means that the 3 is optional.
Here is a good reference on chords
NOTE:
A Polychord is a chord played over a note or over notes that
are not the root note of that chord.
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