Switched laptop dock and now get intermittent static

[pfgiv]

I recently swapped out a Dell TB16 dock for a WD19s dock. The TB16 has a 3.5mm in while the WD19s does not. I purchased an apple 3.5mm to usb C dongle to use my desktop speakers (klipsch promedia 2.1). The speakers will work fine for anywhere from a couple of minutes to an hour, then a loud static noise that is synced to noise, ie if no one is speaking I can hear the ever so slightest distortion, but when someone speaks there is constant static. I figured it was some sort of electronic interference but I unplugged a USB dock and nothing else is plugged into the WD19s and would still get the static when audio plays. The static goes away when I unplug the dongle, or if I switch from the headphone input to my topping D90 dac. Sometimes after a couple of minutes after pausing audio, when I unpause it the static is gone.

Is it likely an issue with the dongle, or the dock? This never happened with the prior dock but also was plugged directly to 3.5mm. I have also tried the dongle in my phone, and it seems to be ok, but I haven't left it on for an extended period of time. Could there be a driver issue within the dock or do these dongles not always play well with docks.

I just updated the drives for the dock and all seemed fine for about an hour then it happened again. I recorded a video off of youtube with my phone. Curious if anyone can pinpoint the issue with the static only being when noise should be produced by the speakers.

Thanks for any insight, but I'm assuming the dongle may be bad? I have the dongle plugged directly to my laptop now, and will update this if it happens directly plugged in, but if it does I think it's quite easy to identify the dongle as faulty

 

[AnalogSteph]

Your problem may well be of a more subtle nature, like input and output being out of sync (which eventually causes a buffer underrun / overflow), dodgy USB power saving or DPC latency issues.

BTW, I found this for the TB16, which I though was quite interesting.

 

[pfgiv]

Your problem may well be of a more subtle nature, like input and output being out of sync (which eventually causes a buffer underrun / overflow), dodgy USB power saving or DPC latency issues.

BTW, I found this for the TB16, which I though was quite interesting.

Thanks for the info. I have no clue what to make of the issue, as the audio isn't the only problem. There's video issues as well. So I swapped the WD19s for a WD22TB4, and same issues. Video problems on one computer, same static happening randomly.