Sinfonias trombone (2010) was composed by the commission of Pedro Henrique de Faria, in tape-trombone format. In this piece, I intended to bring to the concerting filed, the experience of listening daily Mahler (Das Lied von der Erde, Fifth, Third, Kindertotenlieder) and Strauss (Eine Alpensinfonie). Sinfonias is the answer to the following question: “What is it that attracts me in those musics, which thing I have been miscomposing in my own music?”. About this, and so on, I must say I have been talking to Pedro, o Denise Garcia and to Pedro Montessanti.