Nothing else in the apartment uses bluetooth. The ASUS USB-BT400 provides new and advanced Bluetooth 4.0 and enables wireless connectivity with a wide range of devices such as computers, printers, phones, headsets, speakers, keyboards, controllers, and more. A different computer in another room has a bluetooth mouse (though it's usually on standby during the day). the only other Bluetooth thing I have is my FitBit, which periodically syncs to my phone (though the popping happens even if I turn bluetooth off on the phone).sometimes it works perfectly, without anything being changed!.the sound card used is the one on the motherboard, Asus ROG Strix H370-F.I am not aware of the headphones needing any drivers. BT400 uses the driver from Asus' website.I only have a 550W power supply, so maybe it's struggling? Though based on my math, my rig should only use 350-400W max! Re-plugging in the keyboard fixed that (I also removed some USB gadgets I wasn't using) when I first plugged it in, the keyboard stopped working.This improves things somewhat, but doesn't remove the problem entirely The issue happens whether it's plugged in front or the back. Kind of like when the speakers first come on, or when someone taps a microphone. However, when I connect them to my PC, using the ASUS BT400 dongle, there is frequent popping. No distortion, even if I go in another room! The headphones (Sony WH-1000XM3) work perfectly with my iPhone.

I'm not sure how to even start getting to the bottom of this issue.

Asus usb bt400 without cd