Edit the historical newsreel video of the National Grand Celebration in 1949,while Chairman Mao declared that: People's Republic of China found today in a monitor. The video clip was the most well known and influenced historical pieces in the Chinese modernist period, almost everyone can imagine the sound when he seen the piecure.
Show the video piece in a monitor, the audio output to a audio device. A jumping cursor will shows the changing volume of the sound.
A live-camera focus the detail of the cursor, output the image of cursor to a projector, project the video to the wall. All the installation is not sound.
A live microphone was set in front of the space, picking up the sound source of the visitors, and also input to the audio device, mixed with the source of Chairman Mao's sound, influenced the moving image of cursor.