# --use-energy=false  # non default option. False -> Use C0 instead energy
  # NUMCEPS in HTK is without C0: there 12 here 13 - default
  --low-freq=125
  --high-freq=3800
  # --htk-compat
  # --remove-dc-offset  # equivalent ZMEANSOURCE in HTK
  # --subtract-mean  # not recommended to do it this way