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 Robert De Visee; Minuet in Em - gut strung guitar, Fernando Sor - Opus 35: No 1, Andante - gut strung guitar, Hans Neusidler; Ein Niderlendisch tentzlein - Arr. for Ukulele by Jamie Holding