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 play Roadhouse Blues by The Doors on harmonica + free harp tab, I'm a Man, Mannish Boy, Hoochie Coochie Man, Bad to the Bone riffs, Harmonica Blues Train Lesson - How to make your harmonica sound like a train + free harp tab