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 David Oistrakh - Bach Violin Concerto in A minor (3rd mvt.), David Oistrakh - Sibelius Violin Concerto (2nd mvt.), David Oistrakh - Bach Violin Concerto in A minor (2nd mvt.)