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 Stefan Pop - Turandot: Nessun dorma - National Opera Iasi, June 2014, Stefan Pop - Faust: Salut, demeure chaste et pure - Rijeka Opera, Croatia, 2014