Int 62 Fn 009A  u - Fgdriver V4.02 - "fg_quiet" - Stop Continuous Synchro  [V]

   AX = 009Ah

Notes: the FGDRIVER functions are rearranged with each major release, but
     their parameters do not change (see #3145 at AX=0000h)
   This call has no effect if there is no continuous sound playing

See Also: AX=0059h,AX=0080h,AX=00BDh,AX=00DCh