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 In Home Music Lessons-Guitar Lesson #5 - Advanced Strumming Techniques on the Guitar, In Home Music Lessons-Voice Lesson #3 - Combining Your "Speaking" Voice and Your "Singing" Voice