 Although he did not play first trumpet, he was a member of the NBC Symphony Orchestra under Arturo Toscanini.In 1953, he appeared on the Capitol Records album Concerto In C Minor For Piano by Dmitri Shostakovich and "The Four Temperaments" by Paul Hindemith with Victor Aller and Felix Slatkin.During the early 1960s, Mannie Klein appeared on several Dean Martin recordings.