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 Lenny Gomulka w/ H.Guzevich & D.Polisky-When We Met Polka, Full Circle @ USPA 2010 - Lenny Gomulka & Jimmy Weber - Polka Music in My Veins, Polka Country Musicians @ USPA 2010 - Chicken Fried