Int 1A Fn FF03  - Snd - Stop Sound                                         [s]

   AX = FF03h

Return: AH = status
       00h successful
       01h busy

Note:  turns off any sound currently being emitted by the PC's speaker unless
     SND is currently busy processing an API call (this includes
     background music).  Use AX=FF05h to stop the sound even if an API
     call is in progress.

See Also: AX=FF00h,AX=FF02h,AX=FF05h