A team of physics and chemistry demonstrators have taken the Rubens’ tube to the next level by creating a two-dimensional Pyro Board with 2500 holes. When put to music, the pressure variations due to the sound waves affect the flow rate of flammable gas from the holes in the Pyro Board, and therefore affect the height and color of flames. So basically, you can visualize the standing wave patterns. It’s mesmerizing to watch.
Skip to 3:38 if you’re just here for music and fire!