https://www.audiosciencereview.com/foru ... oon.23552/
” Conclusion
The DSP volume control inside the Roon Bridge is as perfect as can be.
The noise floor remains at -178dB, regardless of which attenuation is set for the DSP volume. This means that even at volumes down to -50dB the dynamic at the output is higher as the signal to noise ratio of the best DACs and power amplifiers. No other issues like intermodulation artefacts between the two frequencies or other distortions have been found. The dither is very well done with a completely flat response.
My conclusion is that there is nothing at all to worry about DSP volume in the Roon Bridge. No analogue volume control in the word can deliver these results. The thermal noise of a potentiometer or an analogue ladder attenuator will be much higher than the -178dB the DSP volume control of Roon delivers.”