Quote:
Originally Posted by iltpff
Hi Fretsurce, I am talking about the 7th triad in a major key, which I see some make the 7th triad a diminshed 7th and some just dimished. Are you saying that only when teh key is a minor key that the 7th triad becomes a diminished 7th? I thought the 7th triad in a minor key was a Major chord?
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Now that I know you're talking about TRIADS I can say definitely that the vii chord is DIMINISHED only, not any kind of 7th chord. Triads can only be major, minor, diminished and augmented. It's impossible for a triad to be a diminished seventh or any kind of seventh - they've only got 3 notes.
As for the minor key. Yes chord VII is Major if using the natural minor scale. But if you use the harmonic minor scale, chord vii is diminished. And if you take 4 notes instead of 3 you get diminished 7th
For example, in A harmonic minor
ABCDEFG# A
G# diminished 7 = G#BDF