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 Dave Burrell - Echo, US Steel Cello Ensemble - Bitter Suites Side A (excerpt), E.S. Tüür - Symphony No. 4 "Magma" for Percussion and Orchestra (excerpt)