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 2013-04-12 Troy Concert Band at Chicago - The Minuteman Concert March, Concerto in D Minor for Violin, J. Sibelius - Troy Symphony Orchestra, Concerto Concert, 5/22/14, Mercury Rising, Nathan Daughtery - Troy Percussion Ensemble, Gala Concert, 1/31/15