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 Joan Baez "House of the Rising Sun" Hardly Strictly Bluegrass 2010, Gillian Welch and David Rawlings with David Grisman Hardly Strictly Bluegrass 2010, Mandolin Orange "That Wrecking Ball" Hardly Strictly Bluegrass 2015