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 DOOM E1M1 music comparison on various sound cards - Part 1, DOOM E1M1 music comparison on various sound cards - Part 2, DOOM E1M1 and E3M1 - Virtual Sound Canvas