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 Dark Star Orchestra - "St. Stephen" 7/8/10 All Good Music Festival, Greensky Bluegrass - Gumboots - All Good Music Festival 2012, Old Crow Medicine Show - Down Home Girl