You can pick up a used old one for little money, but if you want that kind of visual it needs inputs for both the x and y axis. If you plug stereo music into that, you get those crazy shapes:)
They used it in a lot of their gigs, saw them live in Montreal, at some point he turns around and looks at the screen.... and he's not playing guitar anymore... he's playing oscilloscope, such a cool idea to project an oscilloscope on a huge screen... brilliant... it was incredibly hypnotic... so instead of stealing the idea we covered half full glass of wine :P
