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 Beethoven. Sonata for violin and piano #6, 1 mov., Beethoven. Sonata for violin and piano #6. 3 mov., A. Tansman. Cinq pieces for violin and p-no 5. "Basso ostinato"