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 Hans Krasa : Brundibar Act 1, Laurent Fris, Robert Martin - Basilique Notre Dame de la Garde, orgue et trompette, P. Tchaikovsky : The Sleeping Beauty, Op. 66. Waltz - ClassicalExperience