Sometimes when you change the audio limiter settings [we generally do not recommend you to do it unless you are experiencing issues or want to experiment] you may hear an echo.
It is created because the system is establishing a second audio connection with the modified settings. It may also happen because of slow Internet connection.
The echo will either go away by itself in about 10-15 seconds or you can press on your keyboard the following 3 buttons simultaneously:
-in Windows: Control + Shift + R
in Mac: Command + Shift + R
It will reload the latest version of InterStar ICP into your browser.