The sound file must be in the Sun/NeXT U-LAW format. @var{sound-name}
should be a symbol, specifying the name of the sound. If @var{volume}
is specified, the sound will be played at that volume; otherwise, the
-value of @var{bell-volume} will be used.
+value of @code{bell-volume} will be used.
@end deffn
@defun play-sound sound &optional volume device