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 Foghorn Stringband - 21 March 2014 - Hell and Scissors, Foghorn Stringband - 21 March 2014 - Damned Old Piney Mountain, Lonesome River Band "Rain and Snow" Gettysburg Bluegrass Festival 2012