ossia score is a sequencer for audio-visual artists, designed to create interactive shows.
Sequence OSC, MIDI, DMX, sound, video and more, between multiple software and hardware. Create interactive and intermedia scores, script and live-code with JavaScript, ISF Shaders, Faust, PureData or C++. Leverage IoT protocols such as CoAP or MQTT, interact with joysticks, Wiimotes, Leapmotions, Web APIs, LSL-compatible devices and BLE sensors and integrate programs from a wealth of creative programming languages such as Structure Synth, Context-Free Art and Bytebeat. Load any kind of audio or video format and process visuals through Spout, Syphon, NDI, Shmdata or Sh4lt ; sonify large datasets with CSV and HDF5 support and process 3D geometry entirely on the GPU.
Free, open source and runs on desktop, mobile, web and embedded, down to Raspberry Pi Zero 2.
Read more on https://ossia.io, come ask questions on the forum or hang out in our Discord or Matrix room #ossia_score:gitter.im, we will be happy to help you !
Running ossia score
Releases are available for Windows, Linux (via AppImage) and macOS.
- Windows: install and run.
- macOS: open the
.dmg and drop ossia score.app in Applications.
- Linux: make executable (right click -> permissions or
chmod +x) and run the AppImage.
Build status
| Platform |
Status |
| AppImage (x86-64 & AArch64) |
 |
| Flatpak (x86-64 & AArch64) |
 |
| Nix |
 |
| ArchLinux, SUSE, Fedora |
 |
| Debian (Bookworm, Trixie) |
 |
| Ubuntu (22.04, 24.04, 24.10) |
 |
| macOS (M1 & Intel) |
 |
| Windows (MSYS2, MSVC 2026) |
 |
| FreeBSD |
 |
| WebAssembly |
 |
| Plug-in templates |
 |
ossia score uses CppDepend to ensure consistent code quality improvements ; please check it out !
In order to build score, follow the documentation.
Packaging status
Contributing
When updating the score repository through the command line, don’t forget to update the submodules, they change often.
cd score
git pull
git submodule update --init --recursive
Some useful and easy potential contributions are listed on the website.
There are also many fixable areas in the code :
- TODO : for simple issues.
- FIXME : for critical bugs / problems.
- MOVEME : when something is not where it should be.
- REMOVEME : when something is redundant.
- RENAMEME : when the class does not match with the file it’s in.
- OPTIMIZEME : when an easy-to-write-but-suboptimal algorithm is used.
Finally, one can write its own score plug-ins to add custom features to the software.
An example plug-in with the most common classes reimplemented is provided here.
Contributors
Code Contributors
This project exists thanks to all the people who contribute. [Contribute].
Financial Contributors
Become a financial contributor and help us sustain our community. [Contribute]
Individuals
Organizations
Support this project with your organization. Your logo will show up here with a link to your website. [Contribute]
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