Anybody want a laugh?

But for me to increase the positive change i must know where and how and what i have done

The it isn't a blind test. A blind test and passing would be removing one thing without your knowledge and you can tell a difference more times than chance. 

My counter dougeyjones to the USB, is that the USB is competently designed and properly isolates the USB from the output including the potential to pass on EMI from the computer through the ground connection on the output to subsequent equipment. That even happens in lab equipment, let alone audio equipment. The higher

Good faith is as important than the truth.....Otherwise how can we look for it?

Robert, do you have any analytical comparisons you’d like to share of USB vs Ethernet vs WiFi, or are we just assuming USB is noisy because OMG PC’s are noisy?

I have seen DACs in system drop from >100db SNR to <80db SNR and traced it back to the AC\DC supply in both desktops and laptops. I have seen SNR on USB powered lab ADCs go from <60db to >80db just by changing from wall powered to battery.  There is a very definite path for switching noise through EMI capacitors on the computer though the DAC into the pre-amp/amp more so with single ended audio connections and  3-wire equipment connections.