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 Troparion of the Holy Cross (by SEM and Vatopedi Choirs), المجد لله في العلاء, Kekragaria (by SEM and Vatopedi Choirs)