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 "Run and Tell That" Hairspray - Drum Cover, "Singing in the Rain" - Vocal Jazz Multitrack by Andrew Kesler (7 part harmony!), "Nokia N8 Jingle" - A Cappella Multitrack by Andrew Kesler (#N8Productions)