The film was noted for early extensive usage of "electronic sounds" on its soundtrack. Electronic music and noises illustrated the work of the computer that deciphers the alien message, the message itself, and the eerie landscape of Venus devastated by the nuclear catastrophe. Markowski, who produced the musical score, was assisted by sound engineer Krzysztof Szlifirski from the Experimental Studio of Polish Radio, with some sound effects added at the laboratory of the Military Academy of Technology in Warsaw and with post-production at DEFA.