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 Josef Gabriel Rheinberger (1839-1901) ~ Organ Sonata No. 4 in A Minor, Opus 98, Franz Liszt - Hungarian Rhapsody No.2 by Double Bass Quartet, Wolfgang Amadeus Mozart - Adagio for Glass Armonica in C-Major, KV 617a