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 Sinfonia Concertante for violin viola and orchestra K.364, Miriam Helms Alien - Mendelssohn E minor violin concerto, Tel Aviv Museum of Art - Music Department Clip 11