Ramsay
The individual character of any note, and the comparative degree of contrast between any two notes in the system, depends on at least three different causes. The first is the genetic relation of the two notes. If the one note has 2 vibrations and the other 3, or the one 4 and the other 5, or the one 5 and the other 8, because of this, and because of the excess of the vibration of the one over the other, "a third sound" or "grave harmonic" being awakened between them, the different ratios have different degrees of complexity, and, in a general way, the greater the complexity the greater the [Scientific Basis and Build of Music, page 60]

Affinity - The genetic relation of notes. [Scientific Basis and Build of Music, page 63]

See Also

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birth
dual genetic scale
genetic direction
genetic number
genetic origin
genetic position
genetic relation
Genetic Root
genetic scale
Ramsay - The "Three" Primes and their Genetic Operations
Ramsay - The Solid Octave in the Genetic Scale
Ramsay - The Three Primes and their Genetic Operations
three genetic magnitudes