This is just a test run for some ideas concerning the relationship between color and sound that I'm thinking about in my animation work and using sound outside of the structure of a western musical scale. The color violet has a frequency interval of ~ 670–750 THz, well beyond the range of human hearing (which is approximately 20-20,000 Hz). For the sound, I just started with a sine wave that varied between 670 and 750 Hz. I wanted each layer in the animation to be represented by an octave of the sound so I either incrementally divided or multiplied the numbers by two until they reached their minimum or maximum range within the audible range. I ended up with ten octaves which meant that I would have ten layers within the composition.
It's pretty loud.