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 Cogburn Woods 5th Grade Band - Sing, Sing, Sing, Sussex Mummers Christmas Carol - 2010 GMEA District V High School Honor Wind Ensemble, "The Falling Rain" performed by the Hopewell Middle School Symphonic Band