Ossia
ossia score sequences audio, video, and interactive media on a timeline, with support for protocols including OSC, MIDI, DMX, and HTTP.
About Ossia
Ossia is the home page for ossia score, an intermedia sequencer that arranges audio, video, and interactive media on a timeline. The homepage describes it as built for interactive shows, where parts of a score can be triggered by external conditions or hardware controls and can branch based on those conditions.
The software connects to many external systems. The homepage lists OSC, MIDI, DMX, HTTP, serial port, CoAP, MQTT, and BLE, along with tools such as Max, Pure Data, openFrameworks, Processing, and Millumin. Users can also script behavior with embedded JavaScript, Faust, a C++ API, or simple math expressions. The homepage says the protocols are implemented in libossia, so other applications using that library can use the same support.
Key features
- Timeline sequencing of audio, video, and interactive media
- Playback of most audio formats, including multichannel
- H.264 and HAP video playback with a shader pipeline
- Sending and receiving OSC, MIDI, DMX, HTTP, and serial data
- Triggering score sections from external conditions or hardware controls
- Visual creation of branching scores using conditions
Best for: Artists, installation designers, and developers building interactive shows that combine media playback with control of external hardware and software.
Good for
- Supports many control protocols through a common interface in libossia
- Lets users switch between timeline and nodal views to edit processes
Ossia at a glance
- Website
- ossia.io
- Category
- Music & Audio › Audio Editing & Production
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Audio Editing & Production
Ossia alternatives
Tools and sites you could use instead, ranked by how closely they match.
ossia score sequences audio, video, and interactive media for shows, with OSC, MIDI, DMX, and scripting support.
For Linux musicians, Rosegarden provides a composition and editing environment centered on a MIDI sequencer, with audio, MIDI, and score editing tools.
VO Pads combines video playback, editing, and sequencing, with an interactive drum machine feature shown on its page.
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Ossia FAQ
Which control protocols does ossia score support?
The homepage lists OSC, MIDI, DMX, HTTP, serial port, CoAP, MQTT, and BLE, and it also lists several other integrations such as Spout, Syphon, Phidgets, and Gamepad.
How can users add custom behavior to a score?
The homepage says users can write JavaScript directly in the score, create device mapping scripts, build audio processors with Faust, extend the software through the C++ API, and write simple math expressions.
Which creative environments can connect to ossia?
The homepage lists Max, Pure Data, openFrameworks, Processing, and glslViewer, and says connections can be made through OSC, OSCQuery, or direct integration of libossia.
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