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 L.v.Beethoven - Violin Concerto Op.61 / Vítězslav Ochman, Lucrecia Roces Kasilag - Lullaby, F.X.Thuri - Vodní hudba pro Český Krumlov (Water Music for Český Krumlov) - Suite