The default sampling rate for Wigout is 22050 samples per second. The length of the sounds you can produce is limited by the amount of available RAM you have on your computer.
If you're trying to make a relatively long soundfile, and Wigout is crashing due to lack of memory, you can reduce the sampling rate on the command line.
wigout -R 11025 datafile
This will set the sampling rate to 11025 samples per second.
Wigout will accept sampling rates of: 11025, 22050, 44100, 48000.