The command line format is: 

                WAV  FILE  /AVE,SPEED,FREQ/

where,

 FILE is the text input file name(s).  If the Extention is blank, .KB
 is assumed.  The name can contain Alphabetic, numeric, - (minus), 
 _ (underline), and the wild card symbols * and ?.;

 AVE is the average sending speed generated (Farnsworth method);
 SPEED is the character speed of the note generated; and
 FREQ is the frequence of the note generated in the WAV file.

For example,
                WAV 1B*  /13,18,730/

would generate WAV files for all input files starting with 1B (and an 
assumed file extention of .KB), using a 730 Hz note with a character 
speed of 18 wpm and an average sending speed of 13 wpm (defaults).

See http://www.AH0A.ORG/WAVGEN/index.html for complete documentation.
This is version 2.0a of WAVGEN, copyright July 1999, J. Speroni,AH0A