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 Dana Bourgeois Custom D150 Brazilian Adirondak Acoustic Guitar, Fazio's Frets Music - Taylor 214CE Deluxe Acoustic Electric Guitar, Garage Tone DriveTrain Overdrive by Visual Sound