INT 62 u - FGDRIVER v3.03 - "FG_MUSIC" - PLAY SERIES OF NOTES
        AX = 006Ah
        ES:BX -> '$'-terminated music string in BASIC PLAY format
Return: after music completed
Notes:  For FGDRIVER v1.10, this function was unused; "FG_MUSIC" was AX=008Ch
        This call is ignored if asynchronous sound (AX=0089h,AX=008Bh,
          AX=008Dh) is already in progress
SeeAlso: AX=006Bh,AX=009Dh,AX=00AAh

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