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 My self build YUSYNTH voltage-controlled modular synthesizer - Making Of, Testing my self build YUSYNTH voltage-controlled modular synthesizer - part 2, Testing my self build YUSYNTH voltage-controlled modular synthesizer - part 1