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 3rd mov. from Mendelssohn Concerto for Piano, Violin and Orchestra in D minor, part 1/2 1st mov. from Mendelssohn Concerto for Piano, Violin and Orchestra in D minor