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 VOCALOID2: Kagamine Len - "Bringing The Rain" [HD & MP3], VOCALOID - "Mr. Music" [HD & MP3], VOCALOID2: Hatsune Miku - "Future & Aquarium" [HD & MP3]