To get in touch with the developers of xwax, use the xwax-devel mailing list. We're interested to hear of any bug reports, technical problems, requests or suggestions. This is by far the best way to send them.
You can find developers and users on IRC: #xwax on irc.freenode.net. Please be patient if nobody is around to help.
If it's your first time with Linux and you're having problems installing or setting up your audio interface then you'll probably find it best to ask a friend or colleague who knows about audio or Linux/Unix first. You're likely to make progress much more quickly this way. Of course, we'll do our best to help you out!
Finally, if you're using xwax successfully, it would be great to hear from you!