"John Barnard" wrote in message
news:7CvLi.18458$x%6.12229@pd7urf2no...

I don't know if anyone has tried but is it possible to remove some of the
IBOC hash on analogue signals by using DSP audio processing?


Most stations are processing even the analog signal digitally, anyway. But
HD processing is generally done separately, to preserve more dynamic range
among other things.