Rodney Milnes compares available recordings of Humperdinck's opera Hansel and Gretel. David Fallows reviews new releases of medieval and Renaissance music, including 15th-century French and Italian courtly love songs from the Hilliard Ensemble, choral music by Robert Fayrfax from the Cardinall's Musick, Victoria's Officium Defunctorum of 1605 from Philip Cave and Magnificat, and Music for San Rocco from Paul McCreesh and the Gabrieli Consort and Players, built around works by Giovanni Gabrieli. Revised repeat tomorrow 12 midnight