This function sets the rate of HomeSeer's speech.
Parameter: speed
Type: integer
Description: This is the speed parameter
to be set. The
range is -10 to 10. A
value of zero is the normal rate of speaking.
Return value: previous
speed or 99
Type: integer
Description: This returns the previous speed setting or returns 99 if the
input parameter was invalid. This is useful for returning the speaking
speed to its previous value after making an adjustment.