In my understanding, a digital signal (defined by a stream of binary bits) can be distorted in one of two ways ("failure modes"): a) a "high bit" or "1" is read as a "low bit" or 0 or vice versa, and b) the timing of the bits is unsteady or fluctuating.
In order to prevent failure mode a) the bit stream includes checksum bits which are verified and in case of error the packet is either corrected or rejected which causes buffering or a drop, not a distortion (amplitude, phase, harmonic) of the sound.
The way to minimize failure mode b), which is also called jitter, is to use good clocks and power supplies.
With careful setup of my wifi network I am not experiencing failure mode a).
The reason for my original post was the potential to minimize failure mode b), the current extent of which I am not able to discern without hard comparison. I am open to practical and cost effective (not pie in the sky) suggestions that target potential jitter with an approach that I can understand. The battery concept proposed by @romanesq makes some sense in this regard.
Please note that once we move to the DAC and analog stages it's a different story.
Cheers!