The implementation of a volume control in a DAC/preamp can be complicated and expensive when done correctly. Many digital attenuators simply subtract digital information to lower volume.
I would suggest you study the Empirical Audio Overdrive DAC's method of attenuation as a benchmark. Keep in mind your purchasing two components in one box. If your media is predominately digital keeping everything in the digital domain is becoming a very good thing.
I would suggest you study the Empirical Audio Overdrive DAC's method of attenuation as a benchmark. Keep in mind your purchasing two components in one box. If your media is predominately digital keeping everything in the digital domain is becoming a very good thing.