Hi, this is the cosmic octaver for you to play with.
What does it do? It generates a set of tables, octaving a set of input time intervals, frequencies or wavelengths up and down, highlighting those in the audible and visible range.
That's it? Basically, yes - except for some features which show the corresponding key, the tuning difference in octaves, halftones and musical cents relative to the 440Hz-Setting of your synth gear.
But that's it, right? Not quite yet - the intervals of all input frequencies will be compared in a second table relative to each other, showing their ratio and the number of halftones in-between. Musical and mathematical ratios will be highlighted.
What is it good for? Let's say you want to "hear" what the solar system "sounds" like when the "pitch" of each Planet corresponds with how fast it rotates and its bpm corresponds with its orbit frequency. For Earth, that would be 1/24 hours and 1/365 days. In musical terms, all we have to do is double each frequency a few times to shift the "note" one octave up until it comes into the audible range above 16Hz. Imagine the bass of slow-spinning venus on her quick orbit around the sun - when, slowly, the high-pitched chorus of the mighty gas giants on their long, long journey swells in!
Of course this works the other way round too: if you know the specific wavelengths of a molecule, you can octave them down until they become "audible".
What are those funky colors in the 380-750 nm range good for? The visible range of the electromagnetic spectrum - that is, the colors of the rainbow between ultraviolet and infrared - covers only one octave. The highlighting color is, of course, only an approximation, you may want to copy the highlighted wavelength value and compute its "real" color for yourself.
How do I use it? Carefully! Check if your results make sense. Check if the UNITS correspond to what you're calculating. Especially when you work with the wavelengths, be sure to check the VoP field twice because this is the "speed of light" and internally, the octaver calculates on "seconds". So if you enter a wavelength in m or nm, it will go f = c / λ first and do its stuff from there. So you CAN use it to transform frequency to wavelength and vice versa for the speed of sound in air, for example (or do as Spock did with the whale songs in "Voyage Home").
If you work on Hertz and seconds and VoP is set to c=299792485 [m/s], not much should go wrong, because the VoP will only be used to highlight wavelengths in the visible octave of the electromagnetic spectrum.
OCTAVE RANGE and the PRESET field should be self-explanatory.
If you have other fun sets of ratios, numbers, frequencies, intervals and wavelength, feel free to E-Mail them to firstname.lastname@example.org or post them in the Dugarun forums!
This octaver is based on the thoughts of Akasha Project and Hans Cousto and was made for fun. It is intended for scientific research, be it of musical, mathematical, esoteric or exoteric nature. The author is not responsible for any harm, physical or other, that may result from usage of this program. No isms should be inferred. For example, there is no reason why the rotation period of a planet in space should make a "sound" of any kind. However, our ears are perfect instruments to analyze intervals on logarithmic scales, thus, the octaver can do for our ears what telescopes and microscopes do for our eyes, "zooming" into a spectrum of our choice. But you always leave some place for doubt if the universe works as you expect anyways, don't you?
It would be cool if...
...it wouldn't just do octaves - maybe logarithm tables to the base of π would be funky, just to be sure not to miss anything?