Our devices use the MIDI protocol over USB. Therefore, you would need to connect via USB on a Raspberry Pi or create a USB connection on an Arduino.
Here is an example of a project by https://tigris.li/, where she uses Arduino platform to generate visuals with Playtron.
To connect to Arduino, you would need to create a USB host on Arduino, this can be done with a shield or with a specific versions of Arduino. This is slightly advanced, here is a discussion on this and also there are ready-made solutions. We are curious to help you with this, so don’t hesitate to contact us, we would improve this tutorial together.