Function:    Sound()

               Sound()   will  generate  sound   of  a  specified
               frequency  for an  undeterminate time.  Using this
               function it is possible to generate Smoother tones
               as the speaker does  not have to be turned  On and
               Off for different frequencies, or kept on at least
               1/18th  of a second. The thing not to forget is to
               turn the speaker off using Nosound().

  Syntax:      Sound(<nFreq>)

  Arguments:   <nFreq>  is the  frequency  you wish  to set, any
               frequency from 20 up to a very very high pitch are
               supported.

  Returns:     Nothing.

  Usage:       * - An example beep()
               Sound(550)
               Delay(20)
               Sound(880)
               Delay(20)
               NoSound()