Do you have another soundcard installed? Are you using the svn
version? The main page says:
"Warning: there is a bug in the current source package of Emutrix,
which may prevent you from running it if you have more than one
soundcard. Please download the svn version instead."
The svn version is here:
http://code.google.com/p/emutrix/source
Let me know if it works!
And if that is not the problem, could you post emutrix' ouput?
Greetings
Camilo