Meet Teletype: hands-on MIDI control for Kraftor
07/10/2026
Meet Teletype, a compact MIDI controller for playing synthetic voices with your hands. Five hinged keys trigger sounds and phrases, while four knobs let you shape the performance. It is designed as a companion for Kraftor, and also works with compatible MIDI instruments and software.
A small controller with room to play
Two bank switches give the five keys access to 20 note assignments. Set up one bank for phonemes, another for allophones or stored phrases, and use the knobs for parameters such as pitch, speed or modulation. The available sounds and controls depend on the voice board and firmware in your instrument.
Each knob can send a MIDI Control Change message or pitch bend. The keys and knobs have independent MIDI channels, so note triggers and continuous controls can address different parts of your setup. The keys send short triggers; holding a key does not sustain a note.
Configure once, then play
Open the Teletype browser interface in desktop Chrome or Edge to choose notes, knob assignments and MIDI channels. Apply your changes and save them on the controller. The settings survive power-off, and the interface is no longer needed once setup is complete.
For a hardware setup, power Teletype by USB and connect its Type B TRS MIDI output to your instrument with a suitable cable. You can perform without a computer. USB MIDI also lets Teletype control software, and the optional browser Monitor view shows incoming MIDI as you play.
Choose your colour
Teletype is available in red, beige, black, white, blue, green and orange. It weighs 160 g and ships from Belgium. The photos show the blue version.
The firmware source, documentation and ready-to-flash UF2 are available on GitHub. Firmware updates can be installed with the browser uploader, without compiling.
