I made one mp3 from three mp3 by cutting out and pasting relevant sections. Clip one and two are OK. Clip three is a bit low. Can i increase volume slightly on clip three only. They are not music they are spoken narration
You have to zoom-out on the vertical (amplitude/volume) scale to do that : place the cursor somewhere on the vertical scale, (it will become a magnifying-glass icon) , then click on the right-hand mouse-button.
The vertical scale now extends from +2 to -2 , ( rather than +1 to -1 ), allowing you to raise (amplify) using the envelope tool , rather than just make sections quieter.