Simple automatic instruments are constructed from local materials and objects on site. The system learns the sounds it can make by trying out its instruments, and then uses its range of sounds to try to reproduce the rhythmic and melodic qualities of sounds such as the voices of visitors. It then loops and alters these imitative sequences into improvised compositions. (That last part's not done yet, so you won't see it in the video.)
It is very cool, the robot plays the instruments with servo motors until it matches the surrounding music/tone. It needs sometime to make it right, still it is an amazing project.
Please check out the video:
installation proposal for artbots 2008 from ranjit on Vimeo.