Surprised nobody has mentioned the SPDIF clock which is an analog RF waveform (if I'm not mistaken) that must stay in sync with the data.
Not sure if AES/EBU any better in that regard, but it is supposed to be easier to guarantee impedance match (110 ohm in this case).
Some manufacturers like Sonic Frontiers implemented an I2Se interface to avoid these issues.
I guess my message is, if you supposedly need a $500+ coax cable to get the job done then maybe you need to choose a better interface. Stack the deck in your favor at least, don't be a victim!
Not sure if AES/EBU any better in that regard, but it is supposed to be easier to guarantee impedance match (110 ohm in this case).
Some manufacturers like Sonic Frontiers implemented an I2Se interface to avoid these issues.
I guess my message is, if you supposedly need a $500+ coax cable to get the job done then maybe you need to choose a better interface. Stack the deck in your favor at least, don't be a victim!