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 Alpine Suite for recorder trio by Benjamin Britten (1913-1976).mpg, Benedictus (Blessed be the Lord God of Israel) Quadruple chant by Sir Herbert S. Oakeley (1830-1903), A Virgin Most Pure (Traditional English Carol)