Warner Classics has announced the release of “Renata Scotto: Sempre Libera, A Farewell.” The compilation features 48 tracks from recordings she made for Columbia/ EMI. Audiences will hear tracks from seven operas including “La Traviata,” “Madama Butterfly,” and “Medea,” where she appeared alongside Maria Callas. There will also be excerpts from a recital alongside conductor Ermanno Wolf-Ferrari and Verdi’s Requiem {…}