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 Boatman Dance / Boatsman (frailing / clawhammer banjo - old time mountain banjo music!), Bill Cheatham (old time: fiddle / violin), Bonaparte's Retreat - AEAE version (old time: fiddle / violin)