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 Sonic The Hedgehog 2 - Boss Theme Music (An Historic Accordion Cover), Castlevania: Symphony of the Night - Wood Carving Partita (An Historic Accordion Cover), Waltzin to Mongolia/Na Sopkah Manchurii - Dr. Caterwaul's Cadre of Clairvoyant Claptraps