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 Dos Guitarras - Violin & Piano, Korngold Violin Concerto - I - Moderato Nobile - Anne-Sophie Mutter, Anne-Sophie Mutter - Mendelssohn Violin Concerto - Cadenza