rOtation is a sound effects library built for sound design centered around things that spin.
This collection contains nearly 200 exceptional sounds and is the first of its kind. If you’re looking for unique new sound design source material, rOtation is the ticket. Several months of research and recording make up this unique collection. It’s props range from ball bearings to trash cans; magnets to fireworks; water to nuts… everything in the realm of rotation. It’s all there; recorded at high sample rates and ready to be stretched, bent, and molded into your next creation.
What’s included?
- Slicing Euler’s Disks speeding up exponentially fast
- Chattering Hurricane Balls spinning up to 5000+ RPM
- Nuts & Quarters zipping and buzzing in Balloons
- Neodymium Magnets bending vibrating Glass tones
- Screaming & spinning Fireworks
- Various Wood, Metal, & Plastic props wobbling
- Much more!
Library Preview

Ultrasonic Content
This library was recorded at high sample rates with microphones that capture ultrasonic sounds. “But I’m not a dog!” you say, “I only hear to a mere 20,000 Hz.”
Fret not, Sound Designer, the ultrasonic content in these collections is captured to allow you to massively pitch-shift and process the sounds while retaining fidelity and revealing elements you couldn’t perceive before. Don’t take our word for it. Listen to some demos and learn more here!

Thorough UCS Metadata
This library has thorough UCS compliant metadata that works across all popular audio database software. Each file is embedded with exhaustive information about the recording.
Aside from the usual ‘description’, many other fields are available that provide useful tidbits like recording notes, microphone information, category, and sub-category. All sound effects also come embedded with an image showing exactly what was being recorded.


























Angelo Palazzo –
Wonderfully detailed and useful sound fx libraries. My favorites are Rotation and Thermal Flux, both of which I’ve used on various shows including Alita: Battle Angel and Stranger Things Season 3. They’re great source material to use for design, particularly Rotation as this library is loaded with unique movements that are often lacking in other libraries.
Nikolaj de Haan –
Love both my Thermal Flux and rOtation library. The metadata is rock solid – even with photos for each sound, and recordings are top quality. Currently using Thermal Flux a lot for designing mad blaze powered da Vinci inspired machines in the game Scarlet Republics
Philippe Desloovere –
I bought CT_004 Rotation to add to my sound design material. Not only are the effects unique and well recorded, but the files are 24/192, so they can be pitched down and still sound bright.
Paolo Armao –
r0tation is a great sounding library obtained with innovative recording approaches! A great starting point for some energy sound effects while we were working on the videogame “Redout”.
Edward Bauman –
Collected Transients is a fantastic sound library creator. The recordings and final content are always unique, with hight quality, and really exploring each of the themes deeply. For example, rOtation contains many different objects of many different materials spinning inside other various materials in many different speeds. It’s all you need for crazy rotating objects sounds. Of course, all of it can also be used creatively, as I have used rOtation to build the sound of a power generator about to explode! Really good stuff!
Joe Barrucco –
“Rotation” has provided me with some amazing unique organic textures for anything that spins in some projects I’ve worked on.
Luke Smiles –
Collected Transients is definitely one of my goto producers for highly detailed libraries for my sound design work. Incredible libraries like rOtation, thermal flux, combustion and machine emanation provide sounds you can’t even imagine and are absolutely perfect for bending and twisting into all kinds of sound design possibilities. And for all of the subtlety, energy and eventual destruction of an urban environment look no further than diffuse city, we are the people, along with implosion. The outstanding quality within every Collected Transients library makes them an indispensable part of my toolkit.
Todd –
Collected Transients have some of the best collection of audio materials I’ve ever used. An excellent source of elements for sound design, my current favorite is the Rotation pack – endless possibilities!
Janne Laine –
rOtation I’ve used many times when something organic but synth-y and drone-y is needed NOW, not in 3 hours (the time it takes me to fire up the synth and go through couple of presets and tweak and layer them with other stuff).
Kristi McIntyre –
I love your rOtation library and use it all the time, the sounds are very unique/high quality and provide great source material that can be used in all kinds of fun and interesting ways.
Harry Barnes –
I find ‘Collected Transients’ libraries great for the basis of some of my sound design work. The Rotation’ and ‘Machine Emanation’ in particular have taken some ideas in completely different arcs for the better! Great stuff!