"HI, Mari here. For those wondering whats happening: Behind the white box, there is a Mac and an audio interface. I am running a software MaxMSP, which is LISTENING to the pitch. loundess and the timing of the violin. The patch I created in Max contains certain interactive instructions such as "listen to the E (highest open string on the violin)". For example in the beginning, if you listen carefully you notice when I play above E, it stops. Iinteractions change in predetermined time frames." (http://createdigitalmusic.com/2008/07/video-violin-vs-robot-guitar-with-mari-kimura-and-guitarbot/)