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 Illiana Chamber Chorale "Sing We and Chant It" - Thomas Morley, Illiana Wind Ensemble "March-Bou-Shu", Illiana Wind Ensemble Part One - "Candide Suite 1-3" - Leonard Bernstein/Clare Grundman, arr.