rms — Determines the root-mean-square amplitude of an audio signal.
ihp (optional, default=10) -- half-power point (in Hz) of a special internal low-pass filter. The default value is 10.
iskip (optional, default=0) -- initial disposition of internal data space (see reson). The default value is 0.
asig -- input audio signal
rms output values kres will trace the root-mean-square value of the audio input asig. This unit is not a signal modifier, but functions rather as a signal power-gauge.