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 Nice weird sounds with the Analogue Solutions Semblance, Altered space echoes (Novation XioSynth 25), How to totally ruin out the beautiful sound of a Moog Slim Phatty