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 Martin Zak - Oranzovy expres / Reubenuv vlak - Old-Time Music, Martin Zak - Starej Joe Clark - Old-Time Music, Martin Zak & Jan Pumpr - Drevar od Mississippi - Old-Time Music