Organ stop footage inversely relates to the harmonic number it reinforces.

Evidence

The following equation relates the footage of a stop to the member of the harmonic series, which its fundamental reinforces: (stop footage) = (footage of first harmonic)/N (5.1) where N = harmonic number (1, 2, 3, 4, …) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1526

Categorization

• DEFINE: A precise formula tying the trade’s footage naming to the physical harmonic series.