Cecilia 5

ear-bending sonics for OSX, Windows & Linux


Cecilia is an audio signal processing environment aimed at sound designers. Cecilia mangles sound in ways unheard of. Cecilia lets you create your own GUI using a simple syntax. Cecilia comes with many original built-in modules and presets for sound effects and synthesis.

Cecilia is free and open source (GNU GPL v3). Cecilia is programmed and maintained by Olivier.

Cecilia's user interface

Download Cecilia 5.2.1

OSX (10.5 to 10.11) | WINDOWS (XP to 8) | SOURCE CODE (all platforms) | HTML MANUAL

Online documentation

User interface, built-in modules and API documentation for Cecilia can be found here.


Cecilia is developed by Olivier on his free time to provide a full-featured processing application for sound exploration and music composition. If you feel this project is useful to you and want to support it and it’s future development, please consider donating money. I only ask for a small donation, but of course I appreciate any amount.