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 Katy singing "Life is Like a Mountain Railway" at Augusta Prep 24 April 2010, Curtis Blackwell & The Dixie Bluegrass Boys - Little Roy & Lizzy Music Festival 3May2013, "Take This Hammer and Carry It To The Captain" by Carolina Rebels 10.13.12