FInally I have a noise issue

@holmz 

Yes.  As you may have guessed I listen nearly exclusively to vinyl with only a little CD/SACD and no streaming or rips.  In any case, it's the artists who are getting ripped.

On your iPod, maybe there's a good reason why they only give you one hole?

It's still amazing how many people think that digital is the final and complete answer to everything (not just in hi-fi) with all upsides and no problems.  IT has a long way to go before its brain is as big as mine.  And yours.

@adambennette 

Actually, it's surprising how often I have to cut the mains to my desktop when it locks or operates very slowly.  It is old though and true that junk gradually builds up on hard disks and cannot ever be cleaned fully, even with programs like Norton and others.

@clearthinker I abide the vinyl fine.
This ADC (and an 8 channel DAC) is my first real foray into digital gear… and the ADC is specifically for measuring the TT stuff. 😋

@holmz 

Thank you.  I am interested in the measurements you are proposing to make of your TT using the ADC.  My arm is parallel tracking so it is much easier than a pivoted arm to set up completely accurately by eye without recourse to measurement by instruments.

Maybe it is the source?

just pointing out that al the discussion of new fanged digital misses the point.  The TRS to RCA cable and the connection is analog.  The noise is ground noise.  No digital involved.