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 Berio/ S. Rattle & CBSO: Sinfonia - I, L. Berio/S. Rattle & CBSO: Sinfonia - IV, Berio / S.Rattle & CBSO: Sinfonia - II O King