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 Cakewalk Sonar 8 Tutorial 5: Mastering (part 1 of 3), Cakewalk Sonar 8 Tutorial 4: Mixing (part 1 of 3)