hello, i'm a big fan of 'do it yourself' inventions.. in fact i tried to build a bit of light n sound headgear of my own just last week. here's what i did.. first of all (this is the easy bit) i put my headphones on with some brainwave sync music playing, in this case it was drum and bass armageddon volume 2. then, i taped a camera under the peak of of an old baseball cap and put blutack over the switch that makes the flash go off (and then i put the hat on to wear of course). well the flashing wasn't really in time with the music (coz the dam flash took too long to recharge each time), but it still produced some interesting effects... drum n bass never sounded so good i'll tell you that much !! anyway i woke up in hospital and my m8 gibbo was there who told me i'd had some kind of seizure. the moral of the story is, make sure u get the flash precisely in time with the music. good luck!