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 DPM - 5 - Mallets: Classroom Exercises, DPM - 4 - Mallets: Basic Techniques, DPM - 7 - Auxiliary: Bass Drum, Gong, Crash & Suspended Cymbals