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 St Elmos Fire - Acoustic Version with Harp Guitar, Sayonara.calm - Harp Guitar - Don Alder, "Ami" - Don Alder Emerald Amicus 12 Solo Acoustic Guitar