 The film 's music and sound was also thoroughly post @-@ processed by the project 's sound designer , Andrei Toncu , to improve the quality of the recordings , because the budget did not allow for complex equipment to be used , and for creative interest . The movie 's background music has reduced volume , following the emotional evolution of the characters — Toncu combining the background music ( recorded with , or without intention ) and a series of effects characteristic to electronic music and musique concrète . However , a few distinct moments can be observed in the film 's music , either composed by Andrei Toncu ( Andrei imagining stealing the trolleybus ) , or already existing recordings , edited so that they would integrate into the movie 's atmosphere ( Elvis Presley 's dedication is dynamically equalized to suggest the shift from one radio to another ) . Another scene in which multiple layers of sound were used was the radio show heard in Giani 's car about the breeding of Memestra brassicae butterflies . 
