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 Well-Tempered Clavier Book Two, Prelude and Fugue in C Minor, J S Bach Adagio in C Minor BWV 1001 Robert Hill, harpsichord, Robert Hill Plays J. S. Bach: Goldberg Variations for Harpsichord BWV 988, Part 1