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 J. Sibelius: Violin concerto in d minor, 1st movement - Monika Vrabcová, 1/2 R. Strauss: Violin sonata in E flat major, op. 18 - Monika Vrabcová