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 Mieczyslaw Weinberg - Sinfonietta No 2, Op 74 - 3. Adagio - Gidon Kremer; Kremerata Baltica, Arvo Pärt: Estonian Lullaby for Choir and String Orchestra