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: Concerto for 3 Harpsichords, Strings & Continuo in C Major, BWV 1064 - Fuga, J.S. Bach: Concerto for 3 Harpsichords, Strings & Continuo in C Major, BWV 1064 - Allegro