10/05/04. edited 02/10/08: The Golden Spiral

? or

Golden Mean or

PHI (1.618...) is a decimal approximation* to the

ratio of the

Fibonacci Series expressed in Whole Numbers. In order of increasing decimal equivalent value, as shown below, the music

interval equivalent oscillates between

Minor and

Major Sixths. As the

PHI ratio decreases a musical

interval of

Enharmonic Sixths is approached save there is no

Enharmonic Sixths in standard

music and as such cannot actually be reached any more than the approximation can resolve itself. [see

12.20 - PHI]

See Also

**12.20 - PHI**
**Golden Mean**
**Quadrature of the Circle**