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 Last Steam Engine Train - Leo Kottke 12 String Fingerstyle Guitar, Crow River Waltz - Leo Kottke 12 String Fingerstyle Guitar, Acoustic Guitar Jam - Blues Improvisation Martin 00-18V and Striebel RS