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 TDVP Episode 7 - "Song For George" - Mountain Dulcimer, Dulcimerica with Bing Futch - Episode 2 - "Cluck Old Hen" - Mountain Dulcimer, Dulcimerica 186 - "Kesh Jig" - Mountain Dulcimer