 In the years that followed, conductors such as Rubik (Ruben) Gregorian, Morteza Hannaneh, Haymo Taeuber, Heshmat Sanjari, and Farhad Meshkat took over as the conductors of the Orchestra.After the 1979 Revolution many musicians of the TSO emigrated to Europe and the US.For some years Heshmat Sanjari and then Fereydoun Nasseri were the conductors.