Carlo Bergonzi & Piero Cappuccilli sing the tenor-baritone duet "Dio, Che Nell'alma Infondere" from Giuseppe Verdi's "Don Carlo" in this performance from 1970.
This is fucking great, with the orchestration the vocals, the coordination, the beauty. Thank you to EVERYONE involved in this. From the bottom of my heart, beauty at its finest!
That "conductor" is Alberto Erede. It's not like he's imitating Toscanini, it's beacuse he studied its well known technique which was absolutely a great idea considering Toscanini was one of the best on conducting Italian opera.