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 J.S.Bach: Sonata BWV 1003 Andante Marko Kampman Guitar, J.S.Bach: 2.Sonata for Violin solo BWV 1003 Fuga