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 Allegro Appassionato by Camille Saint-Saëns Played by Nathan Le, St. Petersburg 2012: Bruch Violin Concerto No. 1; Mvt 1-3