I'm trying to learn a little theory here behind the chords, specfically the C7, A7, G7, E7, and D7. Hope I can explain this clear enough. I know to form the above chords you lower the root note by a whole step. In the A,G,E, and D that whole step is the 7th note in the major scale of that key. Now comes the part I don't understand. For the C7 the added note to the chord is B flat. The 7th note of the C major scale is B, do why do you add a B flat?
Here's the deal: a dominant 7 chord is the 1-3-5-b7 of the major scale.
C scale: C-D-E-F-G-A-B-C
C7: C-E-G-Bb
A scale: A-B-C#-D-E-F#-G#-A
A7: A-C#-E-G
G scale: G-A-B-C-D-E-F#-G
G7: G-B-D-F
E scale: E-F#-G#-A-B-C#-D#-E
E7: E-G#-B-D
D scale: D-E-F#-G-A-B-C#-D
D7: D-F#-A-C
The root of each chord IS lowered a whole step in each case to find the b7 -- you just need to count down two frets, and down two frets from C is Bb.
Make sense?
Guitar teacher offering lessons in Plainfield IL
Got it! Thanks for taking the time to type all that up.
