For some reason, whenever I press a number to add a new note on the tab lines, no sound comes out, if I press play, I hear sound (RSE on or off doesn't make a difference). Any idea what could be causing this?

Try asking over in the Tab Talk Forum. You will get a better answer over there. Also, take a quick look at the stickies, because im pretty sure that there is an ONLY Guitar Pro Help thread, or something to that effect.

In future, the new member forum is for member introductions and questions about the site .

Welcome to UG