pole position question: Missing/garbled voice

mrbill2084

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Got this pole position and the game plays and all the normal game sounds are there, but the voice is either missing or garbled. Any ideas?
 
Speech is done by the custom cpu at 9E (52xx) and the rom at 9C
Dick
Sorry to dig up an old thread, but I finally found a spare PP pcb I had. I swapped 52's and 9c and no change. Garbled/muffled sound.

one thing I did notice is that the mostly working pcb is missing a socketed chip at 10a on the cpu board. On another PP pcb I have(converted to PPII?), the 10a chip is soldered into the board. It has a sn74ls128n in there. I assume that could be the source of my sound problem. Anyone know what it does? Need to find one and see what happens.
 
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