Oh, yeah, common problem. One solution is to check into a Pace box in place of the SA box. Pace's boxes will create a PCM digital audio signal for analog-only stations. The DC-510 and DC-511 are the basic digital cable boxes, but there is also a box that I believe is equivalent to the 3100HD (the DC-550?). Time Warner in Memphis stocks both, but it's extremely difficult to track down the Pace boxes. Check out this thread for some more info.

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