Originally Posted by A_Man_Eating_Duck
Gotta be a typo there. .....controlled transmission of digital audio data..... Nothing is analogue until the DAC does it's thing.
It's a deliberate description. All circuits in a computer rely on the transmission of voltages whether they be full logic high or lows, a data stream or crap transmitted with the signal. These signals can be measured with a multimeter if you are game, or more appropriate a logic analyser. As far as I know, there's difficulty with the term 'digital voltage', doesn't make any sense.
Voltages can be pure DC, a flat line, or alternating voltages from the mains or power line, or weird square waves as we find in computers. Because they vary above zero, they are all analogue in nature, not really digital, how do you define a digital voltage....? The waveform, shape, timing pulses....pretty much open ended. The transmission of voltages also explains why and how noise gets transmitted from the computer to a DAC, the noise is coupled with the signal, the shield, the 0V, and a combination of all three, as an analogue voltage.
Since there is no such thing as digital voltage, then the description of analogue voltages are apt.