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 Hayley & Sophie Westenra sing Up Where We Belong in 2000, Lullaby of Nemunoki - Hayley Westenra ( ねむの木の子守歌 - ヘイリー ) starts at 1m 18s