As far as I know:
First of all, a CDP with variable output doesn't necessarily mean that the volume control is implemented in the digital domain.
Second of all, volume control implemented in the digital domain in a unit working internally on 24 or 32 bits, and Wadia is such an example, doesn't mean sacrificing resolution when the attenuation occurs. Lots of least significant, zero-padding bits to cut into before degradation occurs.
First of all, a CDP with variable output doesn't necessarily mean that the volume control is implemented in the digital domain.
Second of all, volume control implemented in the digital domain in a unit working internally on 24 or 32 bits, and Wadia is such an example, doesn't mean sacrificing resolution when the attenuation occurs. Lots of least significant, zero-padding bits to cut into before degradation occurs.