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 Dvořák, Quatuor à cordes n°12 en fa majeur, Brahms, Trio pour piano et cordes n°1 en si majeur opus 8, Allegro con brio