Replace Ayre Codex with QB-9 DSD?

Hgeifman, thanks for the post. I plan to revisit all the connections and settings today.  Inaudible audio occurs only with Roon and the ultraRendu that sends USB to the Codex that then sends balanced analog to an Ayre A7e integrated.  An Ayre C-5xeMP disc player that uses the A7e but not the Codex sounds as great as ever.  

IIRC the problem was a spontaneous event that occurred before I moved the Mac Mini that runs Roon core upstairs.  Both the Mini and ultraRendu were connected to a Google MESH module, but now the Mini connects to an Ethernet port of the router rather than the MESH network.  That move did take down the Roon control app on the iPad, so I had to reload it, but it seems to be playing Roon files now.  

Moving the Mini didn't effect running Roon bridge on my iMac nor the other Roon endpoint, an Ayre QX-5/20 connected to the MESH network via Ethernet.  I hope my memory is correct, and this is not a network
issue.

If my effort fails, I'll contact Ayre.  They're working on my DX5 DSD now.

I had an AX7e a while back.  Isn’t there a tape loop or something that’s mutes the unit?  I remember something similar and it was my error.

best of luck

In addition to the above post, please review your Roon volume settings.  I am not a Roon user so please see this link:

https://kb.roonlabs.com/Volume_Leveling

@dbphd, Someone on your other Audiogon post reports:

"ROON does have a volume level but I always leave it at 100 and use my AX-5 to set the volume". 

@dbphd, Any news on adjusting the Roon volume level mentioned above?  

Let us start over, again. My assumption is the problem is NOT the Codex DAC (gut feeling).  Any chance of borrowing another DAC from a friend and see what happens? This test will confirm the CODEX DAC works or does not work.

Let us also assume, for minute, the issue is either the Mini or ROON.  What do you mean by inaudible audio?  Does that mean NO sound or just a little sound?  I had a similar issue when streaming from my iPad and had to turn the iPad volume control up to its highest setting.   A little sound means a volume control setting, somewhere, needs to be increased.  In other words, if the CODEX DAC is not working, you will get no sound.  

Does your Mini, Roon, or anything else have a volume control that needs to increased?  Please double check again (sorry), all setting on these devices to ensure their volume setting is set high.  If none of the above, what else could it be?

If nothing, please call Ayre Acoustics for advice.  Please keep posted.