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 Martin 00015M Mahogany Acoustic Guitar - C.F. Martin 00015M, Fender Super Sonic Twin Electric Guitar Amplifier - Fender Super Sonic Twin, Focusrite ISA One Microphone Preamp - Focusrite ISA One