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 Debussy: Sonata pour violoncelle et harpe (Langlamet, Quandt), Attila Reményi: Miniatures for harp, B. Britten: Interlude from Ceremony of Carols (Willy Postma, harp)