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 Royalty Free Background Music - Sci-Fi Alien Ambient Soundscape / Video Game Music, Royalty Free Music - Downtempo Inspirational Melodic Ambient Soundtrack Background, Kabbalistic Village - Sun13 (Slide Guitar Dubstep Trance) Logic 9