A basic major chord needs only three notes. The notes that make up a major chord are: 1, 3, 5. You don't need any other notes to make a major chord.
The I-IV-V, is referring to a chord progression--which is why roman numerals are used, to differentiate. What he is saying is that the 1,3,5 of each chord in a I-IV-V chord progression are all in the tonic major scale.
It is a little bit of a complex way of stating it, however it is good to know.
The I is the root/tonic.
The IV is sub-dominant
The V is dominant.
You begin your paragraph with a statement, this is your 'I'.
The IV doesn't provide any tension against the root, but if you stayed on the I for 8 measures, it would be completely boring. So the IV is like say, and then, and then.
The V is the point. The climax, the payoff, your reason for your first sentence. It has the most tension against the root/tonic, which is why it considered dominant.
Rock n Roll is really all based on tension and release. The 5 creates the most tension against the 1, so when you go back to the 1 from the 5 you resolve that tension.
Now I'll confuse you:
The 2 always substitutes for the 5--always. And the 2 is the 5 of the 5.
The turn around is just the tension resolve part of the song--look at common turn arounds--do you see a pattern?
V-I
II-V-I
II-VI-V-I
III-VI-V-I
III-VI-II-V-I
Last edited by screamin eagle : November 5th, 2009 at 02:03 PM.
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