@minorl
you make a very important point: the analogue section of a dac is actually a preamp. In most cases a simple attenuator will suffice to regulate volume to the power amp. Ideally therefore, the manufacturer of the dac should include analogue rather than digital lossy attenuation.
This might lead one to conclude that rather than endlessly speculate on delta-sigma vs R2R technologies as well as the merits of various DAC chips, more focus should go to the quality of the analogue stage.
It would be very interesting to analyse DACs with a digital out via a reference preamp vs their own analogue stage. While one would still have to speculate about the implementation quality of the digital out- and inputs as well as the cable, it would become a very worthwhile route to better focus on the analogue stage, which after all is the source of most RFI/EMI as well as ground level distortions in dacs.
you make a very important point: the analogue section of a dac is actually a preamp. In most cases a simple attenuator will suffice to regulate volume to the power amp. Ideally therefore, the manufacturer of the dac should include analogue rather than digital lossy attenuation.
This might lead one to conclude that rather than endlessly speculate on delta-sigma vs R2R technologies as well as the merits of various DAC chips, more focus should go to the quality of the analogue stage.
It would be very interesting to analyse DACs with a digital out via a reference preamp vs their own analogue stage. While one would still have to speculate about the implementation quality of the digital out- and inputs as well as the cable, it would become a very worthwhile route to better focus on the analogue stage, which after all is the source of most RFI/EMI as well as ground level distortions in dacs.