An anthropomorphic face robot manifests 'emotions' by changing the expression of its face. A particular control algorithm allows the robot to move its head to the rhythm of the music and to move its mouth following the singing of the song. The movements are not pre-recorded and synchronized to the particular song, but a microphone picks up the music and a particular signal processing (first through analog circuits and then, once the signal has been digitized, through particular algorithms) allows the movement of the neck and mouth to the rhythm of the music picked up by the microphone.