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 Quatuor EBENE: Ravel, Debussy, Fauré -String Quartets, Marie-Claire Alain - Organist Extraordinaire, Renaud CAPUCON - Beethoven: Complete Sonatas for violin and piano