Mute or stop all your players that are running in the background of your computer. You can easily do this by closing all browser tabs you have and making sure that the stream preview on the dashboard isn't playing with audio enabled.
Having the stream playing back on the same device you use for streaming not only takes additional CPU resources but may also playback the sound of your stream, which leads to echo on the final video.
Stream while wearing headphones. This will lower the chance of the microphone capturing unnecessary sounds.
If the solutions above didn’t help and you are using streaming software (like OBS, Ecamm, etc.):
Try streaming and recording locally at the same time.
If you see that the same audio issue is present in the local recording, then it means that it's a setup issue on your end - in which case, check all of your audio devices/sources.
However, if the audio issue is not present in the local recording and only heard on the outgoing stream, let us know by chatting with our 24/7 support.
If the solutions above didn’t help and you are using Restream Studio:
If you have guests on the stream, please, make sure that they are using headphones instead of speakers. You can also find additional recommendations for guests in this article.