It still sounds weird though, even with good mics, so it is always better to use closed back headphones or a mic that is very close to your mouth that doesn't pick up much of the speaker audio (or open back headphone audio).Ī unidirectional microphone also helps a lot.

This is basically how 'noise cancelling' microphones work. It also needs to be the exact same microphone recording both sources. I went to the sound settings in Control Panel>Recording Tab>Microphone(the microphone you are using)>Properties>Listen Tab>Playback through this device, select your mic and then apply. The proper way is to have a second microphone in front of the speaker recording it at the same time as the other mic records your voice, then subtract the speaker audio. The audio output by the speakers is not exactly the same as the audio signal coming from the computer, and it also is delayed. It's basically just inverting speaker sounds, that when played along with the microphone input that's picking up speaker sounds, cancels out any sounds coming from the speakers being picked up by the microphone.

The only way to do it would be to route all of the sounds that come from the speakers into a DAW, while also routing the microphone input, and then inverting the speaker sounds, playing both at once and then using what it plays as the real microphone output. However it might not work that well in practice. It's theoretically possible using software (most likely a DAW of sorts).

Microphone is picking up output sound