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 Bubble Bobble Theme - Toy Piano Version, "Ballad of the Goddess" from Zelda: Skyward Sword (on Davidic Harp), I Don't Want to Live on the Moon - Toy Piano version