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 Bluegrass Mandolin Lesson - Part 1: Man Of Constant Sorrow Chords, Jim Shank (With Tabs) - Mandolin Lesson, Country Gardens (With Tabs & Play Along Tracks) - Mandolin Lesson