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 Nathan Daughtrey: Concerto for Vibraphone (2012) - Northern Iowa Wind Symphony feat. Aaron Ottmar, Bach: Selections from Cello Suites 1 & 2, Brian Crew, trombone, "Grandfather's Clock" - Larry Hooper, 1956 Lawrence Welk Show