A cubic-interpolating sound generator based on the difference equation:
x(n+2) = 1 - a * x(n+1)^2 + b * x(n)
This equation was discovered by French astronomer Michel Hénon while studying the orbits of stars in globular clusters.
for more information on chaos theory henon formulas:
"https://en.wikipedia.org/wiki/Chaos_theory"
"https://en.wikipedia.org/wiki/Hénon_map"
sclang code translation:
| freq | Iteration frequency in Hertz | 
| a | Equation variable | 
| b | Equation variable | 
| x0 | Initial value of x | 
| x1 | Second value of x |