ossia

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 !

Quick download links: latest official release / bleeding edge

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.

This is the beginning of the README. Read the rest at the original. Read the full README ↗