ORCA is an open-source visual programming language, designed to create procedural sequencers on the fly, and control other applications.

ORCA is not a synthesizer, but a livecoding environment to write generative tools able to send MIDI, OSC or UDP data to DAWs (like Ableton, Renoise, VCV Rack, etc.), or an audio server such as SuperCollider. You can also use Pilot, a companion application to ORCA.


You can view the sources, or download builds for OSX, Windows and Linux here:


Each letter of the alphabet is an operation, lowercase letters operate on bang, uppercase letters operate each frame.

To learn more:

If you need some help:

If you're looking for a portable distribution, visit Orca-c. If you're looking for the library for your Monome Norns, visit Orca Norns.

Watch a short video of Devine performing with ORCA at Algomech 2019.


If you want to organize an ORCΛ workshop in your area, let us know and we'll be happy to share it, but please do not charge attendees for access to the workshop.

Keep an eye out for upcoming workshop dates

Hundredrabbits is open to hosting workshops, for travel opportunities contact us at


You can change the look and colour of Orca.

To do this, download themes. You can view the colour palettes of each theme in the preview, once you find something you like, drag the file(.svg file) onto Orca. The colours will change instantly.

These themes are part of the Ecosystem Theme, which means that you can apply a theme to any supported app (Left, Donsol, Pico and Marabu).

You can also create your own themes.


This application supports the Ecosystem Theme. See the License file for license rights and limitations (MIT). Pull Requests are welcome!