1. The article is based on his vocals , analysing and researching their harmonic technique and style from the aspects of the chord structure , the harmonic progression , the mode and tonality etc.

2. The harmonic progression is almost minimal, yet fascinating in that it’s more a study in parallel harmonies than show-offish Atonalisms, and when Cordero does push the envelope, as in a marvelously dramatic guitar break in the second movement, it is always (as Romero puts it) to enhance the music, to give it form and structure, not just to