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Posted by Rizlaman on August 11, 2002 at 05:41:34:
In Reply to: Re: Time to learn chord structures! posted by Carol Kaye on February 17, 2000 at 01:53:16:
A useful thing to know is the how you would construct a chord structure from a scale. A bassist needs to be able to deconstruct a chord sequence in order to work out what notes need to be played to stay in voice.
To expand on Carol's pointers, if you take a Major C scale, add the 3rd and the 5th interval using every note on the scale as a root you would end up with the Triads :-
C, Dm, Em, F, G, Am, Bdim, and C.
This is how chords are constructed on any scale. Knowing this gives the bass player harmonic options because if you take it a step further and add another 3rd on top of the triads you get seventh chords:-
CMaj7, Dm7, Em7, Fmaj7, G7, Am7, Bm7(flt 5), Cmaj7.
You will notice that the V(numeral) chord is G7 (Gdom7), this is because it is built on the dominant note of the scale and as such has a 4th note one semitone lower than a Major seventh due to the interval spacings of the scale (even though it is a major chord itself). Knowing this helps you to voice any accompaniment in a way that adds interest to the structure.
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