g_audioprep: This script takes the loudest channel from a multichannel .wav file
and converts it to any format known by gpkimgclass.py Note that
channel numbers start with zero.
irregularity: This script produces a measure of the irregularity of a waveform.
lib.zero: This is code that, when given a non-negative time-series
corresponding to speech loudness, computes the background noise,
which is assumed to be constant.
peakiness: Computes a measure of the peakiness of the waveform.