Aleksandr was born on 10 March 1926 in Novosibirsk in the family of the surgeon Sergei Dmitriyevich Zatsepin and teacher Valentina Boleslavovna Oksentovich.

[2] In 1956, he graduated from the Kazakh National Conservatory in Alma-Ata in piano and composition[2] According to Zatsepin, if he had not joined the army, he would not have become a composer.

In the mid-1970s, Zatsepin created his own home studio[5] He designed his own version of the Mellotron (which he called orchestrolla).

[7] Zetsepin's work for the animated film The Mystery of the Third Planet became a cult classic and often described as a milestone in Soviet electronic music.

[4] After his departure, his songs were mercilessly criticized, in particular, the newspaper Work on June 3, 1983 published an article "Is there only a moment?

It was argued that this is frank vulgarity, clothed in a beautiful melody, and therefore easily remembered, disturbing young souls with false romanticism, philistine ideas of happiness.