Calculate the Pivot Frequency of a Tilt Equalizer

tilt_eq_frequency.py

from math import pi, sqrt

# Part labels based on the schematic from
# http://www.edn.com/design/analog/4368935/Implement-an-audio-frequency-tilt-equalizer-filter
RF = float(input('RF: '))
P1 = float(input('P1: '))
C = float(input('C: '))
R = float(input('R: '))

pivot = sqrt(P1 + 2 * RF) / (2 * pi * C * sqrt(RF - R) * sqrt(P1 * (R + RF) + 2 * R * RF))

print('Pivot Frequency: %s Hz' % int(pivot))