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 Synth Jam 30: Zoom MS-70CDR (Chorus, Delay and Reverb) with DSI Mopho synth, Fritha Alone (Camel): iPad Music Apps and Yamaha P95