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 Mixolydian Scales for Bass + "All Blues" and "The Chicken", Major Seventh Chords + Weird Solo Groove - Jazz Bass Chords 2/4, Advanced Slap Bass Lesson 1 - Double Thumping