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 Clarinet - Let it Go - Demi Lovato - Sheet Music, Chords, & Vocals, Flute - Nocturne - Chopin - Sheet Music, Chords, & Vocals, Piano - Counting Stars - OneRepublic - Sheet Music, Chords, & Vocals