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 Max Baillie violin: Gopro Bach Chaconne, Baillie Duo (Max Baillie & Alexander Baillie) plays Mozart Sonata kv 576 (arr. violin & cello), Max Baillie viola: Bach Chromatic Fantasy