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 LSS Solo Strings - Viola INSIDE DEMO, SURDOS & SNARES Kontakt Epic Percussion/Drums Sample Library, Catalyst - Epic/Cinematic/Ethnic Drums and Percussion Kontakt Sample Library by ARIA Sounds