I wanted to thank everyone who helped on this thread.  We have cobbled together a solution that allows us to play GNU Denemo in the GNU Linux lab over edubuntu.  Essentially, we require the students to start play sequentially, rather than simultaneously.  It takes a wee bit longer, but it works.
<br><br>That obviously is just a workaround, and not a solution, so we will keep looking for a solution.&nbsp; Thanks again! <br>