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 K. Szymanowski - Violin Sonata op. 9 (J. Oddie + J. Tchorzewski), Witold Lutosławski - 5 songs after poems by K. Iłłakowicz