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 Sample Aid 11.18 Velocity Cross-Fade microKORG on EMU Sampler, Drawbar organ effect using midi-only gear, Sequetron 13.07 with modular synth, drum machine & supernova