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 Carnegie Hall Trombone Master Class: Wagner's Ride of the Valkyries, Sir Simon Rattle Discusses Orchestra Size for Beethoven's Symphonies, Leonidas Kavakos: Beethoven's Violin Sonata No. 5 in F Major, "Spring"