About the Universal Category System

The Universal Category System (UCS) is a public domain initiative by Tim Nielsen,  Justin DruryKai Paquin, among others, and supported by sound librarians, vendors, and users from around the globe.

Our aim is to provide and encourage the use of a set category list for the classification of sound effects. We hope that in doing so, we can offer a framework for consistent categorization of sound effects, offer uniformity in a filename structure, and ease the pain of maintaining a sound effects library.

We also hope to provide tools to make naming and categorizing sound effects easier for everyone who maintains their own personal or a professional library.


All the resources for the UCS are available in our Google Drive repository.

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The main home for the UCS is on Slack. Please join us by following the invitation link below:

We also have a YouTube channel, a mailing list and a Facebook page. You are welcome and encouraged to join us on any of these platforms by clicking the links below: