Hello DIALOG,
I need a bit more information in order to reproduce your. This could be caused by a setting not even related to the Editor itself, but within your sound properties of your audio for your computer.
If you have a microphone attached to your headphones. Mute your microphone because this can cause feedback with any sounds on your system when too loud.
To clarify, are you watching tutorial videos on the wiki page or through the youtube channel?
Thank you,