check the video and some pics & video of this musica project.

Antonia Shultz comments:

The 3 knobs at the left are there to change pattern, pitch and speed. The small red button records the pitch change. The 2 knobs on the right control volume and another pattern of some magnetic sticks hitting the wall (“klack klack klack”).

via [Just, and UrbanArtBerlin on flickr]