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 Concerto No. 2 for Marimba by Ney Rosauro - Marimba Literature Library, Performance Spotlight: Will Calhoun, Tambourine 2: Rolls / Vic Firth Percussion 101