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 UCF Symphony - Brahms Violin Concerto in D - Mv 1 Part 3/3, UCF Symphony - Brahms Violin Concerto in D - Mv 1 Part 1/3