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 Kaija Saariaho: Noanoa (1992), Henri Lazarof: Violin Concerto (1985/1986), Alfred Schnittke: Trio for Violin, Cello and Piano (1985/1992)