The ADC is immediately after the analogue inputs, before the DSP heart of the unit, which is before the DAC for the analogue output. Things like DIRAC and the volume control are all done in the digital domain, hence the requirement for the ADC on the input.I'm confused. You earlier said: "Please test the ADC in units that have them as a core part of their functionality." ADC is Analogue to Digital Conversion, hence it is about the digital out. What do you then mean with "nothing to do with digital out".
I appreciate if you clarify.