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 Respighi: Pines Of Rome | MSU Wind Symphony, Bolcom: Concerto Grosso | MSU Wind Symphony, Brahms: Trio in B Major, Op.8 - III. Adagio & IV. Allegro | Rabinova, Bagratuni, Votapek