INT 62 u - FGDRIVER v4.02 - "FG_PLAYING" - DETERMINE WHETHER ASYNC SOUND ACTIVE
	AX = 008Eh
Return: AX = sound state (0 = no asynchronous sound, 1 = async sound playing)
Note:	the FGDRIVER functions are rearranged with each major release, but
	  their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=0059h,AX=0081h,AX=00BDh,AX=00DCh