Live Recordings 1955 - 1994. The wide-ranging repertory in which Christa Ludwig appeared at the Vienna State Opera, often surprising her audiences over a period of many years, is central to the present set of three CDs issued to mark her 80th birthday. It begins with her Cherubino from Le nozze di Figaro and her Composer from Strauss' Ariadne auf Naxos, both of which she sang at the Salzburg Festival soon after her Vienna State Opera début in 1955.