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 Peter and Kevin Beethoven Violin Cello Duet #1, ClaraC on Glockenspiel Seattle 2011, Seitz Violin Concerto No. 2 Allegro Moderato - Olga Piano Only