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 Sonatine 1, Opus 9 by Francois Joseph Nadermann, performed by Elegant Music at More Art's Stage One, Elegant Music performs Strauss' Artist's Life waltz at More Art's Stage One. www.moreart.us