import pyfar as pf
import matplotlib.pyplot as plt
# create linear and minimum phase signal
impulse_linear_phase = pf.signals.impulse(129, delay=64)
impulse_minmum_phase = pf.dsp.minimum_phase(
    impulse_linear_phase, method='homomorphic')
# plot the group delay
plt.figure(figsize=(8, 2))
pf.plot.group_delay(impulse_linear_phase, label='Linear phase')
pf.plot.group_delay(impulse_minmum_phase, label='Minmum phase')
plt.legend()