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 HarpSummer 2012 Болгария, Гармошечный фестиваль, Особенности кастомизации гармошки Golden Melody, Different sound - Разный звук (вариации)