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 One O Clock Lab Band - "Knuckleball", 2004 - Duncanville High School - Wind Ensemble - Navigation Inn (March) [HD], UNT One O'CLock Lab Band - Hey, That's My Bike!