I've noticed that in Gentoo there aren't ebuilds for a sound server for WindowMaker like WSoundServer or wmsound.
if you can provide urls to home pages for either of these packages we may add them. as it is it looks to me like these packages are unmaintained. feel free to prove me wrong :) I'll close the ticket if we don't hear from you in a week or so, you can always reopen the ticket later.