The 1940 brought inventions that would push the recording technology forward, for example the full-frequency sound reproduction and the vinyl record. An interesting thing is that both these inventions were related to the war effort at the beginning of the decade. The first professional tape recorder, which was developed in Germany in 1939, was refined during the war for use in German radio broadcasting to mislead the Allies. The famous vinyl record appeared on the market in 1948. The work on it started during the war when record companies were dramatically affected by the shortage of shellac, a raw material for the manufacture of gramophone records produced in Asian countries. The introduction of vinyl into mass production turned out to be a very good solution. The new material was more uniform than shellac, and made it possible to use a new type of needle and to reduce the width of the grooves. As a result recording became more precise and soundtrack could be much longer, i.e. up to several minutes of recording on one side of the record with the potential for further development. Note the VEF Super 412 B radio receiver in this room; this stationary receiver was manufactured in Riga (Latvia) and was one of the first radios in the post-war history of the Soviet Union. Presented for the first time in December 1945, it went into production in January 1946. It was based on the pre-war VEF M-517 radio receiver.