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 Daniel Hass (12.5) - Saint-Saëns Cello Concerto I & II, Samuel Barber -- Sonata for Cello and Piano, Daniel Hass (13) - Tchaikovsky Pezzo Capriccioso, Pianist: Jeanie Chung