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 Peterson Tuners: The HillBenders at IBMA 2010, Peterson Tuners - Tuning discussion with Sam Bush, Bob Minner discusses Bluegrass Tuning and the Peterson StroboClip