About this project

ossia score is an open-source, cross-platform sequencer aimed at audio-visual artists who want to create interactive, intermedia performances. Rather than a fixed timeline, it is built around sequencing and reacting to signals, so a score can respond to inputs and drive outputs across many tools at once. Key capabilities described in the README: - Sequence and route OSC, MIDI, DMX, sound and video between multiple software and hardware systems. - Build interactive and intermedia scores, with scripting and live-coding support via JavaScript, ISF Shaders, Faust, PureData and C++. - Work with IoT and sensor protocols such as CoAP and MQTT, and interact with joysticks, Wiimotes, Leap Motion devices, Web APIs, LSL-compatible devices and BLE sensors. - Integrate creative programming languages and tools including Structure Synth, Context-Free Art and Bytebeat. - Load a wide range of audio and video formats, and process visuals through Spout, Syphon, NDI, Shmdata or Sh4lt. - Sonify large datasets with CSV and HDF5 support, and process 3D geometry on the GPU. - Extend the application through its plug-in system; a tutorial add-on demonstrates common plug-in classes. Distribution and platforms: official releases are provided for Windows, Linux (AppImage) and macOS, with packaging also tracked across many distributions. The project states it runs on desktop, mobile, web and embedded targets, down to Raspberry Pi Zero 2, and build workflows cover AppImage, Flatpak, Nix, several Linux distributions, macOS, Windows, FreeBSD and WebAssembly. Community and contribution: the project points to its website, forum, Discord and Matrix room for support, and invites contributions ranging from code quality fixes (marked with TODO, FIXME, MOVEME, REMOVEME, RENAMEME, OPTIMIZEME) to writing custom plug-ins. It is funded through Open Collective and lists both individual and organizational financial contributors. This overview reflects only what the repository README states; it makes no claims about performance, ranking or suitability for any particular use.