Feedback Echo From Computer Sound Card

[GDF1]

I am using Audacity 3.7.4 and everything has been working well, but recently whenever I attepmt to record from my computer soundcard, I get an aweful humming noise and feedback in the recording.

A few days back I needed to record a conversation from my mobile so I did change the Recording Device in the Audio Setup dropdown from Stereo Mix (Realtek) to my Snowball Microphone. Now that I have swiched it back, I am getting the humming noise and feedback / echo.

Nothing has changed in my computer sound settings for input or output, and I have tried to uninstall and reinstall Audacity.

Audio Setup
Host = Windows WASAPI
Playback = Headphones (Realtek)
Recording Device = Stereo Mix (Realtek)
Recording Channels = 2(Stereo)

Any help would be appreciated!

Windows Audio screenshots…

[Wrecks0]

I started getting something like that one day and went crazy trying to figure out the source. I never did. But after I turned my computer off and then on again, it disappeared.

[DVDdoug]

Turn OFF Audible Input Monitoring. With Stereo Mix or Loopback, you’re recording what you’re hearing and with Audible Input Monitoring you’re hearing what you’re recording, creating an internal feedback loop.

[GDF1]

That’s the solution, thanks!