I was watching the visualizer while listening to a song in winamp, and this particular one has two speakers that shoot sine waves. I was watching it and I thought to my self: "it would be great if I reproduce that in real life". After thinking about it my thoughts went to back to that arc speaker I asked about last week. How could one create shapes such as a sine wave with an electrical arc? I'm thinking an array of magnets on opposing sides of the arc. Then you just need to control the polarity and presto. It's a proven method for controlling electron beams, but I'm wondering how effective it would be on such a large arc and at creating such complex shapes. Although I wonder if it's possible with the correct signal to shape the arc on it's own. It can already be made to 'resonate' and create sound. Or is that particular approach stretching it too much? I can see it being near impossible to get the wave amplitude to be large enough for the naked eye to notice.