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 NoiZ guitar duo - Sonata K.27 - Domenico Scarlatti, NoiZ guitar duo - Rondo Mexicano (Concerto op. 201 for 2 guitars, M. Castelnuovo - Tedesco)