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 Mozart: Clarinet Concerto - 2nd movement (Benjamin Zander - Interpretation Class), Stefan Jackiw, violin // Prokofiev Violin Concerto, No. 2, Brahms - Piano Trio no. 3 - 1st movement (Benjamin Zander - Interpretation Class)