Mohammad Heydari

Mohammad Heydari was a santur player and composer, and one of Hayedeh's primary collaborators. He set poems for her voice and brought the arranger Naser Cheshmazar in for the orchestral settings, and he described her technical command plainly: she knew when she had it and when she did not. After 1979 he left Iran, first for Italy and then Los Angeles, where he kept writing until his death in 2016.