# Coefficients for Low-Pass Butterworth IIR digital filter, generated using filter_gen.py.
# Sampling rate: 100.0 Hz, frequency: 20.0 Hz.
# Filter is order 4, implemented as second-order sections (biquads).
# Reference: https://docs.scipy.org/doc/scipy/reference/generated/scipy.signal.butter.html
lowpass = [
   [[ 1.00000000, -0.32897568,  0.06458765],   # A coeff for section 0
    [ 0.04658291,  0.09316581,  0.04658291]],  # B coeff for section 0
   [[ 1.00000000, -0.45311952,  0.46632557],   # A coeff for section 1
    [ 1.00000000,  2.00000000,  1.00000000]],  # B coeff for section 1
   ]