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 Bach C.P.E.: Concerto in D minor, 1. Allegro, H. 427 - Gustav Leonhardt, Bach: Fantasia in C minor, BWV 906 - Gustav Leonhardt