If you have some music that you want to see instead of hear, and if you have some bbq gas and plumbing supplies too. Well why not build a Rubens' Tube? If you're lucky you'll be treated to an amazing representation of the music in flames. If you're unlucky something will explode ;)
The basic idea is that you have a length of pipe with hole drilled along the top. The ends are sealed, at one end there is a speaker and at the other end there is a gas source. Once the pipe is flooded with gas you light the vapour flowing out of the hole, crank some tunes into the speaker and stand back. The speaker creates waves of sound pressure through the length of the tube, and these variations in pressure cause the flow of gas through each hole to vary... resulting in a visualisation of the sound wave painted in flames.
From the Upcoming ueue, submitted by .