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 Tamara Volskaya Anatolyi Trofimov - Russian Potpourri, Daniel Schnyder and David Taylor - Trio as Duo, Mendelssohn Concerto for Violin, Piano and String Orchestra - Movement 1 (part 1)