Quote:
Originally Posted by steve s
Why does a 7th chord make you "want" to do the dominant chord for that key next, for example, hearing G7 makes you want to play C? What is it about hearing that F note that tells your brain, C has to come next?
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There are already great responses. Let's see if I can say it in a very simple way:
Play the following notes from the C major scale : C, D, E, F, G, A, B
Your ear
wants to hear the
B go to the C. Remember that. My example didn't sound finished. Like, "Where is the last note? Finish!"
Now, play the following notes from the same scale.: C, B, A, G, F
It may be more subtle, but you ear
wants to hear the
F go to the E. Remember that, too.
So the B wants to go to the C. The F wants to go to the E. When you play a G7 chord and then a C chord, both happen at the same time. In my examples, you heard that one note want to move to another. With both happening at the same time, that feeling is twice as strong.
Think about the notes in the G7: g, b, d, and f. Both B and F are tendency tones that want to go to C and E.
The notes of a C chord: c,e,and g. The B went to a C, and the F went to an E.