Originally Posted by: ren
A major 7th chord is the root, third, fifth and seventh notes in the scale, so C,E,G and B.
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Could this also be called A add 7? (As compared to the quote below.)


[QUOTE=ren]
An 'add9' chord is the normal triad (root, third and fifth), plus the ninth note in the scale (hence the 'add 9'). Now, there are only 8 notes in the scale, so it actually means the second note of the scale in the second octave, so you would have C, E, G and D.