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 Keiko Abe - Prism, J.S.Bach - Violin Sonata no.2 (fugue) for solo marimba, Keiko Abe - Dream of the Cherry Blossoms