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 Zither Pops 1 Vol.1 - Hubert Wolf and his new electric zither party sound, Zither Pops 2 Vol. 2 - Hubert Wolf and his new electric zither party sound