- May 29, 2019
- Bavaria, near lake Ammersee
Optically isolating the second DAC to break ground loops. It's only relevant if you have an issue with ground loops.
Grounding the PC in that case will cause an additional ground loop.
That´s why I decided to ground the PC (via shielded LAN cable, WiFi disabled anyway) and use an external USB to S/PDIF converter towards the DAC, yielding isolating output transformers even on both sides.
Using a long enough S/PDIF cable (to move pulse edge reflections away for the sake of least jitter - caused by impedance mismatch on the S/PDIF line - some 2-3m long will do), I think jitter perfomance promises to be better than via Toslink (and better 192KHz sampling rate support anyway).