This group (Ivanov, Voinov, Sazonov) produced a number of animated cartoons with synthetic soundtracks (often called ‘Ivvostone’) including Barinia (The Lady) (1931), Rachmaninov Prelude (1932), The Dance of the Crow (1933), Tsvetnie polia, Linii bezopasnosti (Colour Fields, Lines of Safety) (1934) and Vor (The Thief) (1935).