INT 65 u - Media Vision FM(Frequency Modulation)	A method of encoding data as a series of magnetic flux reversals on disk or tape, commonly known as single-density recording.  In frequency modulation, a series of clock pulses are written at regular intervals, with one data bit for each clock pulse.  See also MFM, RLL..COM v4.1a+ - GET VOICE COUNT
	SI = 8001h
Return: AX = ???
	DX = number of voices??? (09h or 0Bh)
SeeAlso: SI=8000h