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 Partita No.3 for solo Violin, Gavotte en Rondeau (performed on marimba), Bach Cello Suite 3, Prelude (performed on marimba), Concerto for Percussion and Orchestra - Eugene Levitas - I tempo