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 Jazz Violin Miri Ben-Ari Jazz Quartet - Moose the Mooch, 5 String Octave Violin Demo, Barbera Twin Hybrid Violin Pickup Bridge on an Acoustic Violin