videos in AudioSet
A list of about a million ten-second YouTube clips, each labelled with the sounds in it, that Google published in 2017. Labs use it to train and test general audio and music models.
Including Stella Maris Round 3 Oratorio Arias - Classical Music Competition, Stella Maris Opera Part 1 of 2 - Classical Music Competition, Stella Maris Round 2 Art Songs - Classical Music Competition