Mads Kjeldgaard

I develop hardware and software for music instruments, installations and art projects, for other people (via Torso Electronics and NOTAM), as well as for my own arts projects. Generally, I open source most of the hardware and software I produce for myself on and contribute to a variety of open source projects.

Torso Electronics S-4


The S-4 is a futuristic, sculpting sampler designed to explore malleable sound. Check it out at



Sparrows is a framework for creating low cost wireless sensor devices for use in interactive installations, performances and music instruments. Examples of these include one with a time-of-flight lensor for measuring distances, one with a light sensor and a more complicated battery powered one which tracks a person’s movements.

The project is open source and includes firmware for the microcontrollers, 3D-printable enclosures as well as helper software for controlling a network of Sparrows. Firmware is available at github, and an example of a helper software for SuperCollider may be found here.

3D audio head tracker

For Notam, I developed this DIY 3D audio head tracker for 3D audio production purposes. By tracking your head’s movements, it allows you to preview a 3D audio (ambisonics) mix binaurally using headphones. Source code and more information can be found here. The project includes a 3D-printable enclosure that you can put the sensor in and attach it to your headphones.