Having an issue with a low frequency buzz when using a microphone.
TUF B360-PLUS GAMING (Realtek ALC887), Seasonic 620 Bronze, Xonar DGX, Windows 10 x64. For microphone I tried a Zalman ZM-MIC1, some generic headset with a microphone, and hands free headset.
If I grab the microphone in my hand, the buzzing increases.
Tried attaching the PC to a UPS, no change.
Also tried Unix drivers, on board sound card with the DGX removed, as well as the planar HDD"s disconnected.
Removed power cable from monitor.
The extension cord has just the monitor and the PC.
On the onboard card the buzzing was lower, but so was the volume. Tried the effects/settings of the onboard card to reduce the issue, no change.
On the DGX decreasing the microphone volume reduced the buzzing, but where it went away the microphone was too quiet.
What would be the cheapest solution? I understand that USB microphones can also buzz, because of lack of shielding?
Ideally I would prefer an attachable type, like Antlion models. I see they have a USB one. I'd like to attach them to headphones, which are comfortable and would like to keep (HD380Pro).
Or should I go for an external USB card, which would be connected to a microphone?
With monitoring on, the buzzing can be seen in the graph below: