High Definition Tape Transfers has released a rare recording featuring superstar icon Maria Callas. The recording will feature a Copenhagen concert dating from June 9, 1963 featuring the famed soprano alongside conductor Georges Prêtre leading the Danish Radio Symphony. The CD features music from “Guglielmo Tell,” “Norma,” “I Vespri Siciliani,” “Nabucco,” “Pagliacci,” “Manon Lescaut,” “La Bohème,” “Madama Butterfly,” and “Gianni {…}