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 Bach - Violin Concerto in A minor - III Allegro assai [Play along], Bach - Violin Concerto in E major - I Allegro [Play along], Vivaldi - Violin concerto in D - Allegro [Play along]