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 Beethoven - Piano, Violin and Cello Concerto, op. 56, pt. 1, Mendelssohn - Violin Concerto Op. 64, Isaac Stern with the Jerusalem Symphony Orchestra, IBA