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 Deftaudio Tubular Bells and Theremin TV2, Deftaudio Mobile Theremin for iOS, iPad, iPhone / Therminvox / Терменвокс для iPad, Robot Drummer - real midi drum machine