An OSC, MIDI and DMX timeline

Draw automation curves for any OSC, MIDI or DMX parameter, add interactive triggers and conditions, and discover devices automatically with OSCQuery. Free and open-source, on Windows, macOS and Linux.

Download ossia score 3.9.0 Try it in your browser Read the documentation

Free and open-source (GPLv3) · Windows, macOS, Linux, Raspberry Pi and web browser

ossia score started as a sequencer for OSC: every parameter of every device on the network becomes an address you can automate, record, map and score over time. It is used to control patches, game engines, media servers, lights and robots.

What you can do

Automation curves on any address: OSC, MIDI CC, DMX channels, or the parameters of ossia score’s own processes (writing automations).
OSCQuery: browse the parameters of compatible software (for instance patches and applications using libossia) and drag them into the score, instead of typing addresses.
Interactive timelines: triggers wait for an incoming message, conditions choose between branches, loops and scenes repeat until something happens (breaking the timeline).
Mapping: scale, smooth and transform values between devices, with curves, JavaScript or math expressions (mapper).
Inputs everywhere: gamepads, Wiimotes, Leap Motion, MIDI controllers, serial ports and Arduino, Bluetooth LE sensors, depth cameras and tracking protocols (PosiStageNet, TUIO, RTTrP, OpenTrackIO) (sensors to OSC).
Many protocols: OSC over UDP, TCP, WebSockets and serial, OSCQuery, MIDI, DMX (Art-Net, sACN, DMX USB), MQTT, CoAP, HTTP, LSL, CAN.
Musical time: tempo, time signatures and quantization when the score must follow a beat (musical features).
Zero configuration: OSC devices are found on the network with Bonjour/Zeroconf, and your own parameters can be published the same way or over OSCQuery.
Every OSC transport: UDP, TCP client and server, SLIP and COBS framings, host names instead of IP addresses.
Clean sensor data: calibrator, deadzones, noise gate, hysteresis, debounce and easing curves (value filter, calibrator).
Address patterns: combine, apply and sweep OSC address patterns to drive many devices at once (pattern matching).
MIDI tools: virtual MIDI ports, network MIDI ports provided by the operating system, MIDI file playback, filters, microtonal Scala scales, and the computer keyboard as a MIDI input (MIDI).
Record and replay any device to CSV, including incoming DMX (recording).

An interactive timeline where a trigger waits for an external event in ossia score

OSC sequencing needs, and how ossia score answers them

What you need	How ossia score does it
Automating the parameters of another program over time	Curves on any OSC, MIDI or DMX address, and OSCQuery to browse parameters instead of typing them.
The same tool on Windows, macOS and Linux	The same features on all three and on Raspberry Pi, except for features tied to an operating system or to hardware, such as Spout, Syphon or CUDA.
A timeline that waits for events, branches and loops	Triggers, conditions and loops are part of the timeline, not an add-on.
Turning controllers and sensors into OSC	Gamepads, MIDI controllers, Arduino, depth cameras and tracking systems, mapped with curves, JavaScript or expressions.
Sound and video next to the control data	Audio, video, 3D and shaders in the same timeline as your OSC, MIDI and DMX automation.
A simple control surface on a phone or a tablet	The browser remote, without installing an app.

Pairs well with

ossia score speaks OSCQuery natively through libossia, which also exists for Max/MSP, Pure Data, Unity, Python, SuperCollider, openFrameworks and Qt: add a few objects to your patch or project and its parameters show up in score, ready to be automated.

Download ossia score 3.9.0 Try it in your browser Read the documentation

Free and open-source (GPLv3) · Windows, macOS, Linux, Raspberry Pi and web browser

More ways to use ossia score

Stage and music

Show control — Cues, scenes and timecode for theatre, concerts and events.
Live electronic music — Synths, drum machines, sampler, step sequencers and plug-ins, in sync with MIDI clock, timecode and visuals.
Spatial audio — DBAP, GBAP and trajectories over any loudspeaker layout, up to 1024 channels, and control of spatialisation renderers.
Dance and interactive theatre — Pose detection, depth cameras, sensors and tracking drive sound, video and light, inside cues and scenes.
Contemporary music and live electronics — Interactive scores that wait for the performers, cues from pedals, live processing and spatial sound.

Video and light

Video, mapping and VJing — Video playback, multi-projector mapping, shaders, 3D and NDI, synchronised with sound and light.
DMX lighting and LEDs — Art-Net, sACN and DMX USB with a fixture library, LED pixel mapping, all in sync with sound and video.
Generative art — Shaders, 3D, gaussian splats and live coding, performed live or rendered frame by frame.
Recording and streaming — Cameras, SDI, NDI and SRT in; ProRes or MP4 recording, RTMP streaming and NDI or Spout out.

Spaces and experiences

Interactive installations — Sensors, cameras and tracking, sound and video, running unattended on a PC or a Raspberry Pi.
Museums and exhibitions — Exhibits that run all day without staff, with monitoring, a staff control panel and kiosk apps.
Escape rooms and attractions — Puzzles, props and sensors driving sound, video and lights, with game logic and a game master panel.
Kinetic art and robotics — Motors, pumps and robots written on a timeline, reacting to sensors, in sync with sound, video and lights.

Tools and research

Visual programming — Patch audio, video and interaction with nodes and a timeline, and run your Pure Data patches.
Real-time AI — Pose detection, depth from a webcam, real-time image generation, language models and machine learning by example, run locally.
Protocol bridge — Convert between MIDI, OSC, DMX, MQTT, serial, HTTP and Bluetooth LE, with mapping and filtering, always on.
Research, sonification and biosignals — LSL, HDF5 and CSV data, sonification, biofeedback, and sessions recorded and replayed on a timeline.
Teaching and workshops — One free tool for sound, video, light, sensors and code, on every OS, in the browser and on Raspberry Pi.
Custom apps — Package a project with your own interface as an app for Windows, macOS, Linux or the web.

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