@thyname When you are dealing with Layer 1, the Physical layer where cables dwell, there is no such thing as 'digital audio transmissions'. There are only 0s and 1s represented by 0-300mv for Zero and 3.6-3.8v for Ones. Layer 1 has no mechanism for discriminating any data types, that all occurs at Layer 3, 4, or above, and is software, not hardware.
So how does a cable give you better 0s and 1s?