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 Ashbory Bass solo (my first attempt at one), YAMAHA TRB 5II solo (With ZOOM B1 drum machine groove), Yamaha TRB 5 String Bass with Korg Kaossilator