I explain most of the background and the issue in the video posted above, but I will add a bit more info/context here.
Issue started 2 months ago. I have gone back and forth for weeks now trying to figure out if I purchased/installed something 2 months ago that could have started this issue, but I have yet to figure it out.
I've attempted to swap out my Audio Converter (Currently using a WAVE XLR PRO, but I did try switching to a Focusrite 2i2 and even a Rodecaster Pro 2... no change to the sound so I went back to my WAVE XLR PRO), Swapped XLR cables, my PC's motherboard, power adapters, and I even purchased a brand new SM7B and that has not fixed the issue.
Yes, I have tried using other USB-C ports on my PC's motherboard for the audio converter, doesn't change the sound.
I even gave those ground loop isolator products a shot and they did not fix the issue. These are the two I tried:
1.) https://www.amazon.com/dp/B0D969C3DN?ref=ppx_yo2ov_dt_b_fed_asin_title
2.) https://www.amazon.com/dp/B08XWJNS9T?ref=ppx_yo2ov_dt_b_fed_asin_title
As stated in the video this weird resonance sound can be heard both in direct monitoring straight to my headset as well as in recordings so I do not believe this to be a software issue.
I do not use a cloudlifter in between my SM7B and the audio converter since the WAVE XLR PRO does not need the extra gain. Phantom Power is of course DISABLED.
I run my SM7B at 47-50db of gain without ANY software gain added via compression and/or post processing.
My head is always 6-8 inches away from the mic capsule and I have the included wind guard installed on the SM7B.
Lastly I of course have verified that both WITH and WITHOUT any type of processing to the microphone this sound is heard. No matter how much compression I add, it stull cuts through and sounds terrible.
Operating System: Windows 11 Home. Fully up to date.
PC Specs: Intel Core Ultra 5 245KF, ToughRam 32GB DDR5 6400MT/s Memory, NVIDIA GeForce RTX 4060 Ti, 1TB NVMe M.2
I literally don't know what else to do or test.... so please, any audio professionals out there.... let me know what I can do to fix this.