So to break all of this down:
1) All digital inputs are initially upsampled to 24/192
2) Anologue inputs are digitaised to 24/96 or 24/192 (and so presumably if you set the internal ADC to 24/92, it is then itself upsampled to 24/192 per the digital inputs)
3) Internal DSP uses 40/192 or 40/384 (maybe the integrated amps are 192 and dual mono are 384) The old brochure states upsampling of all content to 40 bit, so presumably the volume control etc. uses 40 bit. Maybe ADH also? I am not so sure about ADH.
All of this leaves the initial question.
Could you have a true ADH power amplifier without the DAC? Feed it an analogue signal and you get an analogue output, no ADC, no DAC, pure analogue. OK - For a start there would be no SAM, or any other DSP, and it would need to be a pure power amp (rather than analogue integrated) or at least the 40 bit floating point volume control replaced with an analogue equivalent.
So I think the basic question is, could a version of ADH be made to work without the TI PCM1792 DAC chip and run with an analogue feed? Earlier posts stated that this is not possible, although to be honest I am not 100% clear as to why exactly this is.
I am sure as I can be that such a beast would never actually be build, but it is fun to speculate I guess.
1) All digital inputs are initially upsampled to 24/192
2) Anologue inputs are digitaised to 24/96 or 24/192 (and so presumably if you set the internal ADC to 24/92, it is then itself upsampled to 24/192 per the digital inputs)
3) Internal DSP uses 40/192 or 40/384 (maybe the integrated amps are 192 and dual mono are 384) The old brochure states upsampling of all content to 40 bit, so presumably the volume control etc. uses 40 bit. Maybe ADH also? I am not so sure about ADH.
All of this leaves the initial question.
Could you have a true ADH power amplifier without the DAC? Feed it an analogue signal and you get an analogue output, no ADC, no DAC, pure analogue. OK - For a start there would be no SAM, or any other DSP, and it would need to be a pure power amp (rather than analogue integrated) or at least the 40 bit floating point volume control replaced with an analogue equivalent.
So I think the basic question is, could a version of ADH be made to work without the TI PCM1792 DAC chip and run with an analogue feed? Earlier posts stated that this is not possible, although to be honest I am not 100% clear as to why exactly this is.
I am sure as I can be that such a beast would never actually be build, but it is fun to speculate I guess.
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