SOUND IEXP

 Function
  Turn on the speaker on the local computer at a specific frequency.

 Syntax
  SOUND freq

   freq  - An integer expression (1-65535) with the frequency (in hertz)
           at which to turn on the speaker or 0 to turn off the speaker.

 Remarks
  This statement can be used to generate just about any tone desired on
  the speaker on the local PC.  It has no effect on the remote computer and
  will only work with the built in speaker (in other words, it has no way
  of communicating with advanced sound cards).  You specify the frequency
  of the tone you wish to generate in hertz and pass it to the statement,
  or pass 0 to turn off the speaker.

 Examples
  PAGEON
  FOR i = 1 TO 10
   MPRINT CHR(7)
   SOUND 440
   DELAY 9
   SOUND 0
   DELAY 9
   IF (KINKEY() = " ") THEN
    CHAT
    GOTO exit
   ENDIF
  NEXT
  :exit