INT 18 - Gravis Ultra Sound YEA_GUS.EXE - PLAY MUSIC                            
	AX = 6905h
	BL = voice number
	BH = sample type (0 = 8-bit, 1 = 16-bit)
	CL = looping type (0 = none, 1 = forward, 2 = back and forth)
	CH:DI = 20-bit starting address for voice data
	DL:SI = 20-bit address for loop start
	DH:BP = 20-bit address for loop end
SeeAlso: AX=6903h,AX=6906h,AX=690Bh