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 Tchaikovsky: Variations on a Rococo Theme / Justus Grimm (Cello), Brahms: Violin Concerto (1st Mvt / Part 2) / Tatiana Samouil, Mendelssohn - Violin Sonata in F major (3rd Mvt) / Tatiana Samouil