MP 1,1-5,1 Aux Speaker Popping USB 3.2 card the issue?

[Jigga Beef]

I’ve been starting to get speaker popping through my Logitech Speakers connected to my Mac Pro 5,1 via the AUX cable.



At first, it seemed to be random and it started a few weeks ago and I’ve realized it seems to have started when I added a Sonnet Allegro Pro USB 3.2 PCIE card and there is data being transfered.



I know USB 3.0 can have some interference with other things via the few raspberry pis I run but I had never heard of it with aux audio.




I am just at a loss for whatever else could be causing it because my system has been the same for a few years and i never had this issue.



If it's coming from the USB 3.0 is there anything I can do to stop the sound from happening. Even when I mute the computer it still comes thru the speakers.

 

[arw]

First of all, nothing is impossible. But you‘re right, normally USB 3.0 is rather known for interfering with Bluetooth and 2,4 GHz WiFi.
Is it feasible to switch the PCI-E slots? If it‘s induced by EMF interference to the Mac‘s onboard DAC, maybe the physical relocation is enough.
If your soundsystem can be fed via optical instead of analog out, that would be better.
Temporarily you could switch to the Mac’s front headphone jack.
If that doesn‘t change anything, you could try moving (the speaker containing) the amplifier further away from the Mac‘s back.
Of course switching off the speakers themselves should stop it.

 

[Jigga Beef]

Its the highest PCIE slot so my thought if it moved closer it would be worse but that's a good troubleshooting step.

I had not thought about the headphone jack in the front good idea. That gets it away from the back from the computer.

The set of speakers I use currently do not have an optical output but I have used optical speakers in the past and could go back to an old TV soundbar I have collecting dust.


And yes speakers being off does in fact stop the sound of course.

Thanks for the ideas!