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 Bach - Flute Sonata in B minor, BWV 1030 (Murray/Goldstein) Complete with Sheet Music, Ravel - Pavane for a Dead Princess (Pavane pour une infante défunte) for Piano; with Sheet Music, Bach - Flute Sonata in C major, BWV 1033; Alexander Murray on flute, Complete with Sheet Music