Don Carlo
Ghiaurov, Freni, and Bumbry were great voices in their time, and they are still effective here -- good enough musicians to put over the quite heavy vocal and expressive demands of their roles. Louis Quilico was never quite in that league, and he sounds a bit spread and woofy in places here
Plácido Domingo
Mirella Freni
Nicolai Ghiaurov
Louis Quilico
Grace Bumbry
Ferruccio Furlanetto