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 A few non-preset Yamaha DX100 sounds, Techno Mixer Jam, Arpeggio Fun - Ableton Live, Blofeld, Pulse, MFB 522, DX100, Alpha Juno