Options and their meanings are:
-I Identify program and version number.
-i item Select input item.
-w "Whisper" data, when no FX is present.
-x spitem Use external excitation from given speech item (must match in sampling rate).
-m Use voice mix track to control degree of periodic excitation. Designed for use with output of vdegree(SFS1) program.
-s samplerate Specify synthesis output sampling rate (should be bigger than twice top of highest filter).
FX Fundamental frequency contour, used for voice-switch and Fx.
CO Filterbank energies generated by voc8, voc19, voc26 or filtbank.
SP (External excitation mode) Input signal to filter.
TR (Optional) Voicing mixture track (see vdegree).
SP Speech waveform.