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 Mandolin Brothers: Martin (new) 00018GE Golden Era Acoustic Guitar, Mandolin Brothers: Bluegrass Duet Chrises Thile and Eldridge, D'Angelico (used, 1955) Electric Archtop Small-bodied Guitar