Resonance

Resonance is a mechanical relationship between Lines of the same number (e.g., a 1st line resonates with another 1st line, a 4th with a 4th, etc.).

Profiles built on resonance (1/4, 2/5, 3/6, 4/1, 5/2, 6/4) are called Transitional Profiles. They have a more self-contained and internally-focused mechanical process compared to profiles built on Harmony.