Windows 10 keyboard makes sounds when pressing T?

When I type something in the chat on Twitch or Microsoft Teams, Word etc, every time I tap the T, there's a noise that I actually only know from the fact that I plug in and unplug a USB stick. Where does it come from, how do I get rid of it? Is that a hotkey that I accidentally set (friend's idea)?

Probably a sound scheme or an output of the chat.

You can change the sound scheme, but it is a gigantic effort for one tone.