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 9/8 Thing a tune by Andy Bole of Fret and Fiddle played on the baritone ukulele, Fret and Fiddle (Sweet Sue), Fret and Fiddle Music for a found harmonium