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 3OH!3 - Double Vision (ukulele + UBass cover), Monkey Island: Elaine's Love Theme (bass and ukulele), Mega Man 'Elecman' Theme Song (bass cover)