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 Suite No. 1 by Fred E. Smith, 2026 Arizona Regional Percussion Audition Etudes, Extra Spices, Please! (for solo marimba and optional conga) by Josh Gottry