The symphony consists of four
movements: The main theme of the symphony was devised by projecting the outline of mountains at
Belo Horizonte, Brazil, onto graph paper and transcribing the result as a melody. Villa-Lobos called this technique
milimetrazação (graphing), sometimes rendered in English as "millimetrization". or "milmeterization". A harmonized version of this melody for piano, together with a similar treatment titled
New York Skyline, was initially published in the October 1942 issue of
New Music, devoted to works by Brazilian composers. The first movement is in a slightly unconventional
sonata-allegro form which, according to the composer's usual methods, omits the second theme from the
recapitulation. The overall tonal centre is on C, with secondary key areas on D and G. In the second movement, Villa-Lobos utilizes a technique of drawing attention to a pitch through its exclusion, in an arguably atonal passage in b. 33–47 where a clarinet solo weaves a long melody repeatedly using eleven chromatic notes, with the omission of the note G. This pitch is then introduced emphatically in the viola entrance at b. 47. ==References==