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Algorithmic ecosystem: a dynamic, musical event triggering platform.

Scripts are assigned to each of the eight trigger inputs. Herein you can set CV values (four outputs) and trigger gates (four outputs) with extended functionality for pattern manipulation, slews, randomness, sequences, basic arithmetic, stacks, delays, and much more.

Edit scripts with a USB keyboard (included with new modules + replacements available) which plugs into the front panel. Syntax is simple and easy to learn with the provided tutorials, video, and reference pages. Teletype runs without the keyboard attached: you might treat editing as pre-composition, or leave the keyboard plugged in for live coding.



  • Eurorack
  • 18hp width
  • 26mm depth

learning Teletype

The basics of Teletype are quick to learn. The studies will get you started and the manual provides a complete reference.

You can also access in-module help any time by using ALT-H to toggle help mode.



Align the 10-pin ribbon cable so the red stripe corresponds to the white indicator on the rear of the module’s circuit board. This is toward the lower edge of the module.

Be careful not to misalign the connector left-to-right either – while Teletype is protected against incorrect connection, doing so may damage other modules in your Eurorack case.

Secure the module with the four included screws, hiding under the tape in the box lid.

Power consumption:

  • 72mA @ +12V
  • 12ma @ -12V
  • No +5v required


If you wish Teletype to communicate with Ansible or other modules with ii, you will need to attach an ii cable (not included, but DIY’able here) as outlined in the ii Communication page. Teletype can also connect to a world of other i2c-capable devices. If your Teletype has a green circuit board, it can support 2 direct ii/i2c connections. If it has a black circuit board (Dec 2018 revision), it can support 4 direct ii/i2c connections.


Teletype cannot use a USB keyboard if it has an internal USB hub, and does not work with USB hubs in general. Otherwise most keyboards should work, but keep in mind that backlit keyboards etc. are drawing power from Teletype, so you may wish to use external USB power. Teletype assumes the keyboard layout is US-ANSI. For more discussion, see lines.


Firmware updates may be available. The currently installed firmware version is displayed at startup.

It is possible to backup all your presets as part of the module’s firmware; see modular firmware updates.


Teletype is open-source. Since its initial release Teletype has grown an improved extensively thanks to various contributors including @sam, @scanner_darkly, and @sliderule. Additionally the documentation has undergone full reworking.

Discussion happens at All contributions are welcome!

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