Conductor Ferdinand Leitner (1912-96), learning his trade from masters like Walter, Busch, Richter and Karl Muck (as rehearsal pianist at Bayreuth), gained the experience that lead to his being dubbed the "singers' conductor" by all who worked with him during a long and lustrous career marked by his tenure as Zurich Opera music director (1969-84) and some 300 commercial recordings. The 1970's-80's Bayreuth stalwart, bass-baritone Franz Mazura as Tamerlano and famed American lyric soprano Helen Donath as Asteria headline this 1966 Leitner-led performance of Handel's Tamerlano.