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 Edward Elgar - Violin Sonata in E minor - 2nd Movement, Romance, Edward Elgar - Violin Sonata in E minor - 1st Movement, Allegro, C.P.E. Bach (1714-1788) Flute Concerto in D minor (1st Movement)