The Musician Wren (a.k.a. Cyphorhynus arada) whistles melodies that sound 'human'. Musicologist Emily Doolittle and biologist Henrik Brumm found that Musician Wrens preferentially produce successive perfect octaves, fifths, and fourths; the basics of human harmony.
Luisa Pereira knows about music, interaction design and sequencers. She has developed a few good looking, easy to use harmonic sequencers. Classic western harmonic theory and the rules of counterpoint in two handy wooden boxes. Should be on the market!
FM is a synthesis method that's been covered in detail on this blog, but so far in the digital realm only. Here's an analog patch, featuring the Doepfer A-143-9 VC Quadrature LFO. Basic DX-style FM sounds are really easy with this module: it has thru-zero linear FM capability.
The claim: the universe is made of dynamic octave relationships. These particular octaves should not be thought of as whole number ratios (the Pythagorean octave concept) but as moving patterns or scenarios. These octaves are the key to all mysteries of the universe. If you know what to look for, you'll start seeing them everywhere.
The claim: Pythagoras didn't discover the octave, nor did he 'invent' the Harmony of the Spheres. Sumer (modern-day Iraq) was the birthplace of writing, mathematics, the wheel, agriculture etc. The Sumerians developed the first extensive acoustic~arithmetic model of the Universe. Certain similarities between astronomical cycles and musical tuning systems explain why music, numerology, astronomy, religion, poetry and mathematics were fused into one meta-science.