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I am playing the fourth etude by Guano Guiliani for classical guitar and he seems to take the liberty of using diminished fifths in his music. What principles did Guiliani follow in his composing-- that is, what music theory underlies his composition style?

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closed as unclear what you're asking by Matthew Read Jun 29 '13 at 17:36

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

-1: Are we talking about this piece of music? Please help us maintain a high level of quality on this site by doing your due diligence when asking a question. I should not have had to search out this piece of music, much less find the correct spelling of the composer's name from Google. –  NReilingh Jun 29 '13 at 5:07
The title seems to clash with the actual question, and I think you need to provided some impetus for it. As Tim has noted, a composer can do whatever he wants with his work. –  Matthew Read Jun 29 '13 at 17:36
My fault, I will be more wary of the site's rules and regulations next time, sorry. –  Chris Olszewski Jun 29 '13 at 19:48
Don't only improve "your next question" - you can work on this one :-) –  guntbert Jul 3 '13 at 20:39

2 Answers 2

I don't think he was thinking of intervales per-se... in classical conception of harmony, intervals appear as being part of chords. Probably, the diminished fifths you found are part of a tension chord (a dominant, as in G7 or G#º). Those intervals do generate a lot of tension and need to be 'solved' in some way, but the leading thinking is about chords, scale degrees, and harmonic functions (relaxation -> tonic chord vs. tension-> dominant chords).

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Why would it be a liberty? It's his work. There's no way diminished and minor seventh flat fifth chords can be written without using a flat five.

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