It is useful to tune the external frequency b as a is increased to maintain a fixed, irrational winding number. The Golden Mean ½(5½-1)=0.61803... plays a special role, since in some sense it is the most irrational number, and we will follow this value.
| a | b | Orbit | Spectrum |
| 0.5 | 0.6144 | ||
| 0.95 | 0.6075 | ||
| 1.0 | 0.60665 | ||
| 1.05 | 0.6056 |