I've repaired the external I/O Hub of my AUDIGY PRO, by changing one of the PCM1804 Analog to Digital Converter.
None of the 3 analog inputs were working, and the 5 volts (7805) and one 3 volts (LD33) regulators were very hot.
The PCM1804 assigned to the 3rd Analog input was in defect. When I removed it the other channels started to work again.
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