Sound                    Turns Sound On with Given Frequency

 Sound(Freq: Integer);                                                   [TP]

    Turns sound on at a specified frequency (Hertz). Note that the sound
    remains on, even if the program is terminated, until it is explicitly
    turned off by the NoSound procedure.

            Freq    Integer value; frequency of sound in Hertz (Hz)

  -------------------------------- Example ---------------------------------


           Sound(1000);             { start sound at 1000 Hz }
           Readln;                  { wait for user to press <ENTER> }
           NoSound;                 { stop sound }