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 Sonata No. 1 in g minor for violin solo, Fugue; J.S. Bach, The Black Page, by Frank Zappa, Sonata No. 1 in F Major, by Benedetto Marcello