ETHERNET CABLES

I had pops and noises when switching digital sources.   I removed the CAT 8 between Aurender and DAC , problem solved.  Also set up the TP Link rg45 to Optical converters and system is free of pops and noise when switching. 

Someone mentioned CAT 8 is bad for audio a while back.   Apparently the metal shield of the connector can cause problems with audio gear on the network

@oddiofyl 

I had pops and noises when switching digital sources.   I removed the CAT 8 between Aurender and DAC , problem solved

How was your streamer connected to your dac using ethernet cable?

It was the Ethernet from the switch to the Aurender.    Someone mentioned a while back that CAT 8 could cause issues and I said yeah right.  I took it out and the annoying pop when switching digital inputs was reduced greatly to a "tick"    

@oddiofyl now the connection makes more sense. I doubt it was the ethernet cable.
Some DACs will pop. My bryston dac popped every time it was about to start playing DSD file. 

@oddiofyl 
Some DACs produce mechanical clicks (pops) when changing sample rates or when you pause / resume stream. This is normal, I don’t think it has anything to do with Ethernet cable or Aurender streamer.