Cymatics is the study of visible sound vibration. The word derives from the Greek 'kyma' meaning 'billow' or 'wave,' to describe the periodic effects that sound and vibration have on matter.
Here's some food for thought from collective-evolution.com on why you might want to convert your music to a different frequency. The post isn't the only place with info about the notion that maybe you could be getting even more out of your music, but it's a good place to start.
From the website:
"... musical frequencies can alter our own vibrational state. Every expression through sound, emotion or thought holds a specific frequency which influences everything around it—much like a single drop of water can create a larger ripple effect in a large body of water.
"With this concept in mind, let us bring our attention to the frequency of the music we listen to. Most music worldwide has been tuned to A=440 Hz since the International Standards Organization (ISO) promoted it in 1953. However, when looking at the vibratory nature of the universe, it’s possible that this pitch is disharmonious with the natural resonance of nature and may generate negative effects on human behaviour and consciousness."No wonder so many of us are fascinated by electronic music visualizers. They aren't the same thing as cymatic visual patterns but we intuitively know that it's the right direction.
Here's a tutorial on how to go about changing the frequency of the music you listen to. It gives instructions for using Audacity (free) and Adobe Audition (paid). Note that if you're using Audacity, you will want to look at a second video to learn how to create lossless audio files. Note also that you can try Adobe Audition with a free trial.