Ilan wrote a detailed post on his blog about the challenges he faced with while worked on the installation: http://www.ilankatin.com/passages-challenges/ The article provides a broad overview of the production. However he kindly provided me with more detailed information about the technical side of the installation: The lines are drawn by Processing, triggered by Vezér using MIDI. He used a Processing library called MIDIBus to trigger the sound in Ableton Live, where Vezér also controlled the levels of the “train sounds”.
**Ilan Katin:**"I am an artist. I play with images, make drawings and occasionally installations."