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 Harpsichord Concerto in D minor BWV 1052, Heinichen Dresden Concerto in D Seibel 226, D'Anglebert Chaconne de Phaeton