by Chris De Warenne
What is a three note chord?
A Triad, simply.
Every other note. To remember the “formula”.
1, 3, 5: Root, Third, Fifth. Every other note. See “fundamentals” in your Music Dictionary.
In the key of A Major the letters would be A, C#, E. every other note. E.g., C# is the Third.
That is a Major “Triad”. An “A Major Chord”. (*intervals)
A “POWER CHORD” is usually a Root and a Fifth. Two Fingers. Two notes.
In the key of A these would be: A and E. 6th string 5th fret, 5th string 7th fret.
A typical Jazz chord might be a Triad that is embellished with more notes, to put it simply.
In the Key of A Major you could have: A, C#, E, G#, B. (1, 3, 5, 7, 9) AMaj9.
Notice the addition of a “9”. This implies that the “9” is above the Root by an octave.
1,2,3,4,5,6,7,8(1),9,10,11,12,13(6)…
Likewise, a Major 13 chord includes the Major 7th & 9th, plus the higher 6th, which becomes a 13 (always add 7 to it).
Chord “substitution” is an approach using less of a formulaic note choice, like the triad (1,3,5) and instead using, for example, 3,7,9.
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