Options and their meanings are:
-I Identify program and exit.
-i item Select input item.
-t type Select output file format. Available are: RAW (binary), WAV or RIFF (Microsoft RIFF format), VOC (Creative Labs), AU (Sun), AIFF (Audio Interchange), HTK (Hidden Markov Model Toolkit), ILS (Interactive Laboratory System), SPS (Entropic Signal Processing System)..
-o datafile Store the contents of the data set in the file datafile rather than listing them on the standard output.
-a (Binary file output only) With -t RAW switch, appends data to file.
-s (Binary file output only) swap byte order in binary file. Default is native machine order, or as required by foreign file format.
-8 (WAV, VOC, AU formats only) Save top 8-bits of samples only.
SP Any speech item.
LX Any excitation item.