In the CAGED system, do the shapes ALWAYS match up to ANY and ALL scale shapes in that area? I was watching your youtube video again, and the second part at the end you reference the Eb mixelodeon (sp?), and how the d shape and a shape fit into it. but do these CAGED shapes fit into all scales?
The CAGED shapes can serve as the basis for most scales. Certainly the Major, Mixolydian, and Lydian scales fit well. Also any major based arpeggio works. When you get into minor and more altered scales, you can still use the CAGED shapes, but some of the notes will need to be adjusted. The 3rd of the scale won’t match the note used in the CAGED pattern. If you use the Super Scale Trainer to view minor scales in reference mode with the CAGED display turned on you’ll see what I mean. The CAGED shapes still make a great starting point, but a little extra work is required.
Start with the “E” Shape at the 5th position. This gives you an “A” major chord.
If you build a Mixolydian scale off of this shape you get the following:
Notice that you can build this scale straight off the CAGED shape. Not so with minor. In minor we have to alter the CAGED shape a little. Take a look at the following:
Most of the strings include the original CAGED note (shown in red). However the third string does not, because that CAGED note is not in the minor scale. But, since the CAGED shape is providing a note on 5 out of 6 strings it still makes a good starting point for building the scale.
If you look closely at the above minor scale, you may notice that even though the full “E” shape is not in the scale, the full “E minor” shape is. Instead of using the major chord as a skeleton (CAGED shape), a minor chord can be used, in which case you’d have a note on every string. That would look like this:
The concept is the same: Use a first position chord as the skeleton for scales and arpeggios. The only difference is you use a minor chord instead of a major. Try it out!
If you are new to the CAGED system watch our introduction to the CAGED system.