Russian improvisation trio, one of the early Soviet free jazz bands. The late Soviet Union was not renowned for its contributions to jazz, but it did produce at least one notable group, for in the '70s and '80s the Ganelin Trio was arguably the world's greatest free jazz ensemble. Comprised of pianist Vyacheslav Ganelin, saxophonist Vladimir Chekasin, and drummer Vladimir Tarasov, the trio's mostly improvised music was as emotionally intense as anything being created in the U.