Masters of Persian Music is a Persian classical music ensemble (or "supergroup") founded in 2000 by four internationally recognized ustāds (masters) of the genre: vocalist Mohammad-Reza Shajarian; composer-musicians Hossein Alizâdeh and Kayhan Kalhor; and M. R. Shajarian's son, multi-instrumentalist singer Homayoun Shajarian.The ensemble formed with a view to touring Europe and North America (where Kayhan Kalhor has lived for much of his adult life). Although not all of the four had collaborated together previously, M. R. Shajarian had worked with Kalhor and Alizâdeh. In 1998 he sang for a studio album called Night, Silence, Desert, which Kalhor produced. He also sang the score that Alizâdeh composed for Ali Hatami's historical drama Del Shodegan (1992). Both albums were published on Delawaz Records, a label Shajarian started for the preservation of Persian classical singing.