INT 62 u - FGDRIVER v3.03 - "FG_VOICES" - PLAY SOUNDS IN BACKGROUND
        AX = 00ABh
        ES:BX -> tone array (see below)
        CX = number of times to repeat tone array
Notes:  For FGDRIVER v1.10, this function was unused; "FG_VOICES" was AX=008Bh
        This function is only available on the PCjr and Tandy 1000 machines
SeeAlso: AX=0048h,AX=006Bh,AX=009Eh,AX=00AAh

Format of tone array element:
Offset  Size    Description
 00h    WORD    channel number (0000h terminates array)
 02h    WORD    frequency
 04h    WORD    volume
 06h    WORD    duration in 1/72.8 seconds

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