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 J.S. Bach: Prelude and Fugue in D-Major, BWV 850 (WTC 1), J.P. Rameau: L'Indifférente (Sean Price), J.S. Bach: French Suite No. 3 in b-minor, BWV 814 (Menuets)