@frequencyfield: Something new on the channel. This is a Rubens tube. A metal pipe with hundreds of small holes along the top, filled with gas and set alight. When sound plays through it, the flames respond to the pressure field inside. Where the pressure drops, more gas escapes and the flame reaches higher. Where it builds, the flame pulls back. The fire is reading the wave. Every peak and trough you see is a node in the sound field made visible. The pattern changes with the frequency. The fire just shows you what was already there. 528 Hz. #528hz #cymatics #soundhealing #frequency #soundbath