WAVE EDITOR
FL Studio includes an integrated wave editor which allows you to edit samples quickly and effortlessly without having to use external applications.
The editor allows you to do all basic operations over the samples, such as fade in/out, record normalize volume etc.
You can edit any sample by opening its Channel Settings and pressing CTRL+E, or by opening the Channel Settings menu and selecting the Edit command.
Select any of the following topics for more information on the integrated wave editor: