Orlando Fraga
https://orlandofraga.blogspot.com/
(…While much of Villa-Lobos’s music is relatively easy to apprehend in terms of “standard” tonal practice, certain aspects of his music seem to defy easy explanation. Phrase structure, linear-motion, and hypermetrical organization are among them. Several analytical studies of Villa-Lobos’ guitar music have been undertaken; however, none appear to deal specifically with these subjects. For their fairly defined melodic contours, all five Preludes are adequate for phrase structure analysis. However, not all of them qualify for a linear-motion approach in the more strict Schenkerian sense.
Preludes 3 and 4 are meant to suggest more improvisational, toccata-like passages. They preserve a rhapsodic or capricious quality through their almost free and sometimes ambiguous tonal progressions strongly based on chordal parallelism. Therefore, Preludes 3 and 4 would be better suited to some other analytical approach not dealt in this study, and for this reason will not be analyzed here…)
Phrase Structure and Linear Progression in Villa-Lobos Preludes 1, ,2 and 5 for Guitar