Miroslav Krejci was born on the 4th of November, 1891 in Rychnov nad (a small town situated in the eastern part of Bohemia of the Czech Republic). There, he also attended high school. After graduation he travelled to Prague, studying natural science, geography and musicology at Charles University. At the Conservatory he studied composition under Vitezslav Novak. Krejci also became a teacher at a few grammar schools in the Czech republic. He died on the 29th of December 1964 in Prague. Miroslav Krejci created music for many various ensembles and his compositions are among the most prolific of Czech composers. For example, he composed the following: two Operas: The Summer and The Last Hetman, two Symphonies, string quartets, sonatas for violins, trios for wind instruments, sonatinas for brasswind instruments and piano and five piano cycles. He wrote many vocal compositions, especially for chorus. Krejci also created many arrangements of folk songs for chorus and for solo voice with piano accompaniment.) The Sonatina for Trombone and Piano was composed in 1948. It was first performed on the occasion of the composer's birthday.