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 The Real Sound of Halloween - Royalty Free Music Review, Downtempo, Electronic Chillout Groove - Royalty Free Music Review, Cinematic Hollywood Style Soundtrack for less than 15 GBP - Royalty Free Music Review