It’s quite amusing to discover sometimes the same sound assets being re-used in so many different recordings. For example:

Rammstein – Sonne: The main hook of the chorus (starting from the second one) is a repeated chant by a female voice.

…Which is a sample from Spectrasonics’ “Symphony of Voices” library.

Spectrasonics is the company that produces, among other things, the expensive but highly respected Omnisphere software synthesizer and numerous sample libraries.

It’s founder, Eric Persing, used to work as Roland’s chief sound designer for 20 years, and was responsible for the iconic sounds of such still highly regarded instruments as Roland D-50, JD-800, and many others.

Returning to the sample:

This is the soundtrack to the game Freespace 2 released in 1999, two years prior to ‘Sonne’ and the entire ‘Mutter’ album. At the 1:32 mark, the same sample is clearly audible, only slowed down and rearranged.

The same ‘Symphony of Voices’ library was used to create the soundtrack for Diablo II and several others.

There are even stranger things happening.

A phenomenally psychoactive album by the raison d’être project, largely built on Gregorian chants, only heavily slowed down and processed…

…And then you suddenly discover that this is the sound from the E-Mu Emulator II sampler, a venerable old device that had been in heavy use since mid-1980s: Laurent Boutonnat (Mylene Farmer’s composer/producer), Depeche Mode, Genesis, Paul McCartney, Tangerine Dream, New Order, Front 242, Enya, Jean-Michel Jarre, Vangelis, Yes, Stevie Wonder, Pet Shop Boys, Enigma. The list goes on and on.

That is, of course, an open secret that the same common sound libraries are reused over and over again for a variety of purposes—I’m almost certain, for example, that the background sounds of the swamp from the 1980 Star Wars (Master Yoda’s final sanctuary) later ended up in the game Hexen (1995), and probably not only there.

I think if you dig hard enough, you can find even stranger coincidences.

P.S. For a long time, I’ve been publishing free samples that I recorded or constructed myself on Freesound.org. The most popular was and remains this one: https://freesound.org/people/decembered/sounds/42761/ – 8k+ downloads and a bunch of mentions from people who used this in their film and other projects (and, frankly, I don’t even remember how I made it).