Compare the original index n with the composite growth substitution N = n^(n+1). The graph shows how the substitution slows phase growth and damps the sharper irregular behavior.
Cyan = original n. Orange = substituted N = n^(n+1). Pale red = difference field. Roughness is estimated from average absolute step-change across the plotted curve. The audio generator can play the original field, the composite field, or their difference.