The super tweeter (loudspeaker device for ultra high frequencies) plays music in fast forward while the sub woofer (loudspeaker device for ultra low frequencies) plays music slowly. Their pitches are modified so much that you cannot find out the original any longer. The speaker set is videotaped with surrounding scenes. The music is recovered by speeding up or down the video, which, however, cannot help but modify the videotaped scenes relatively.