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 Cold Pressed (David Hollinden) - Jan Nguyen, percussion - May 2013, How (Regina Spektor) cover for marimba and band - arr. Dan Vaughan, percussion - 2013, "Overture" from The Royal Fireworks (Handel) - William & Mary Wind Symphony - December 2011