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Posted by: Twinbroz Sep 14 2011, 02:31 AM

I play guitar and know it very well just not much theory. I know a C chord has the notes C, E and G. How would you figure out what a C7 without the notes being presented?

Posted by: MonkeyDAthos Sep 14 2011, 03:00 AM

for example you know that a C Major is form by tonic, major third, and perfect fifth.


so C Major = C E G.

Now a C7 chord aka C dominant = you need a root, major third, perfect fifth, minor seventh


knowing the interval chart, also help u alot in finding the notes.


Root Note
Minor 2 - one half step up the root
major 2 - two half steps up the root
minor 3
major 3
perfect 4
Tritone aka aug 4/ dim 5
perfect 5
minor 6
major 6
minor 7
major 7
octave.


another way, is training your ear to recognize intervals.

so for example you ear this interval




E
B
G
D 5
A 3
E

You would know, that the sound belongs to a perfect fifth, you know you root "C" and what a perfect fifth up C, G!

The more deeper you unlock your ear, the more you will automaticly recognize "chords, intervals, scales" and their notes.

Posted by: Daniel Realpe Sep 14 2011, 11:08 PM

C1 D2 E3 F4 G5 A6 B7 C8

From this scale to get a 7th chord choose notes

1 -3 - 5 - 7

Apply to any scale or key, works the same!

Posted by: Cosmin Lupu Sep 14 2011, 11:38 PM

Usually the notation C7 is used in respect to a C dominant 7 chord rather than C major 7 chord. The formula above is more often encountered under the name CM7 while de C7 has the following formula: 1 3 5 b7. I've seen both being used so, just pay attention to the context and you'll figure it out