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 Синтезатор СССР Юность 21 Часть 1 / Soviet Synthesizer Unost 21 Part 1, Синтезатор СССР Юность 21 Часть 2 / Soviet Synthesizer Unost 21 Part 2, Электроника ЭМ-25