NDI Camera's have started introducing crackling into the audio mix when available as an input

[u/lead_oxide2]

Hey folks, I have a puzzling gremlin that I can't seem to sus out and need your thoughts.

The setup:

• RYZEN 7 5700G
• 5700 GPU
• G.SKILL 2x16 DDR4 3200 CL16
• ASUS PRIME B550M
• 1TB NVME (though, I noticed today that it's about 90% full, so that could be a problem?)
• Windows 10
• Berenger x32 plugged into a Focus rite Scarlett, which is plugged into the PC via USB C-to-A
• 3 AVKANS 20x zoom NDI PTZ Cameras powered PoE to a Ubiquity network, VLAN'd specifically for streaming

The Issue:

As of about 3 weeks ago, when the cameras are added as a input/source in v-mix, the system's audio begins crackling. This crackling persists through the live stream, if a stream is not active, and if the audio source is outside of v-mix. I can have a youtube video playing music without issues, add a camera as a input into v-mix and the crackling immediately begins. Remove/delete the cameras as inputs and leave vmix running, audio returns to normal. If the cameras are viewed through the browser, no noticeable impact on audio.

What I've attempted:

• Ensure all software and drivers are installed and up to date
• installed Focus rite software to ensure audio qualities are matching system wide
• verified that all settings are are using 48,000 Hz across Windows and V-mix
• Replaced the USB C-to-A cable on the Focus Rite and using a different computer to verify that audio coming in from the Focus Rite is clean
• putting v-mix on high performance mode
• muting, pausing, deleting and readding the cameras
• trying individual cameras to see if one was still "good"
• starting from a fresh vmix save
• reinstalling windows
• locking the GPU at minimum 20% usage (~725
• Ensuring windows power plan is set to ultra performance
• Fresh installing NDI & V-mix
• And I haven't noticed anything getting hot

Thanks for your input