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 Rite at Stonehedge Orchestra for Violin by DelBorgo, A Gypsy Tale Orchestra for 2nd Violin by S. H. Newbold, Spartacus Orchestra for 1st Violin by Balmages