Jazz Guitar Upper Structures: How Shell Voicings Become Rootless Upper-Structure Voicings
Upper structures aren't a separate subject — they grow out of shell voicings. Drop the root from a 1-3-7 shell, raise the guide tones into tensions, and you're already playing upper-structure, rootless voicings.
Jazz Guitar Upper Structures: Why the Altered Sound Is Just a Half-Step Triad
The altered scale terrifies a lot of advanced jazz guitarists because it looks like a different theory subject. It is not. It is a single upper-structure decision: play the minor triad a half-step above your dominant chord, and you have already produced the entire altered sound. Here is how to wire that into your II–V–I.