Music by Vladimir Sidorov.1. Catastrophe from suite \' Ten Pieces for piano \' (opus 14, 1976-1978).2. Prelude from cycle \' Prelude, Etude and Improvisation for piano \' (opus 17, 1977).3. Etude from cycle \' Prelude, Etude and Improvisation for piano \' (opus 17, 1977).Performed Victoria Arkhangelskaya. Jubilee author\'s concert by composer Vladimir Sidorov. Concert Hall of Magnitogorsk conservatoire; October, 1, 2006.