The send-snd and to-snd functions work for me in MacOSX and sbcl with Gtk and Motif Snd's, but not if I start in a non-X11 terminal -- my first guess is that clm needs the X11 support to talk to snd, so it too needs to be started in an X11 environment, but I'm just guessing. I'll look at it more carefully tomorrow. The actual code is in sc.c.