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 The Unionville Hornpipe - Playalong fiddle music by Anne Delong, The Harried Husband - fiddle sheet music by Anne Delong, Severwright Waltz by Anne Delong - Playalong sheet music for violin