Sound in Performance

Rush describes the element of play in detail, saying that "play in art signifies performative enactment through movement." He also goes on to say that "Movement is the key to play."
I agree that movement has to do a lot with the concept of play in intermedia art. In fact, the reason video is so well-used is because it is one of the best ways to capture movement. Most performance pieces are based heavily on movement, and thus, video becomes a natural pairing with performance. This can be seen in many of the performance pieces on this blog. They rely heavily on movement and some of them are impossible without it. The piece "Walking in an Exaggerated Manner" is a piece based solely on the person's strange movement around a square. There is nothing to the piece without the movement. There is no single shot or moment that summarizes the whole performance, and therefore, the video format is necessary.
However, I also think sound has a big role to play in performance art. Sometimes, in performance art, it is not the movement that creates the art, but the sound. It is like imagining an orchestra with no sound. The passion of the players can be seen in the motion and their touch, but half the beauty is in the sound. This can be seen in the video "I am not a girl who misses much". Yes, the girl's movements are very exaggerated and the blurred quality of the video gives a lot of the feelings of the video; however, the sound of the girl saying she doesn't miss much gives deeper meaning and emotion to the video. I almost think her voice and the sounds are what makes the video so dramatic.
Another performance video that relies heavily on sound is Bruce Nauman's Violin tuned D.E.A.D. In the whole video there is barely any movement at all. In fact, we cannot even see the player. However, the sound the violin makes is the whole performance. There would be no meaning to this piece without the sound of the untuned violin. The emotions we feel from this piece is from how the violin is played, not how the person is standing or moving. Therefore, I think sound (even sound that is not present) is an important part of the performance.