Playing sound in background

[shen@glean.Jpl.Nasa.Gov (Sheldon Shen)]

I have a recorded message played when a user clicks a HELP button.  This message is stored as a resource.  The problem is when the message is playing, you cannot do anything else until it stops.  On a SUN Sparc, I can do (run-shell-command ...) in Allegro LISP to get around this problem. How to run two things simultaneously in MCL?

Sheldon Shen