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 【Nico Nico Chorus】Happy Synthesizer / ハッピーシンセサイザ【8 People's Chorus + 2】, 【Nico Nico Chorus 合唱】天樂 / Tengaku / Music of Heaven, 【Nico Nico Chorus 合唱】Ayano No Koufuku Riron / Ayano's Theory of Happiness / アヤノの幸福理論