Int 1A/AX=FF04h

AX = FF04h
DS:DX -> ASCIZ music string

Return:
AH = status
00h successful (music begins playing in background)
01h busy

Note: The music string accepted by SND is not the same as that accepted by BASIC and other programs which process music strings

See Also: AX=FF00h - AX=FF05h - INT 80/BX=0006h