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 J.S.Bach: Fuga in sol minore BWV 1000, Marcel Dupré: Prélude et Fugue en sol min. Op.7 n.3, F.G.Turrini: Sonata IV in G minor