The fascinating and unconventional artist Lorraine Hunt Lieberson died yesterday at her home in Santa Fe. We in New York heard her only infrequently in opera, most recently in Serse and La clemenza di Tito at the NYCO and Les Troyens at the Met. She was scheduled to sing Orfeo in a new production of Gluck’s opera at the Met next spring; no word yet on the Met’s website who might now be cast in these performances. In tribute to Ms. Hunt Lieberson, we will hear the mezzo-soprano in music from Handel’s Theodora tonight preceding the regular program on “Unnatural Acts of Opera.”