In Luigi Rossi’s Oratorio per la Settimana Santa, an assem­bly of demons is gloat­ing on the prospect of Christ’s Crucifixion. Against the back­drop of their schaden­freude, the gut-wrench­ing lament of the Virgin hits like an earth­quake. Frank Agsteribbe guides his cantoLX and the Ensemble de la Chapelle Saint- Marc through this jew­el and oth­er baroque pearls by Rossi.