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 How To Use Control Voltage in a Roland System-100M Modular Synthesizer, Michael Schack Explores the Sounds of the Roland TM-2, Roland GAIA SH-01 Synthesizer Overview by Adrian Scott