Looking for Setup instructions? We’ve got you covered! Our recent Audacity for Mac OS X Installation Tutorial includes setting up LAME as well!įor today’s walk-through, we’ll be applying Fade In and Fade Out effects using Audacity 1.3 Beta (Unicode) for Mac OS X. Have you ever needed a sound to start off very softly and ‘fade’ in to a higher volume level? How about the need to ‘fade’ out to complete silence? In today’s posting, we will take our readers through the steps of using our favorite free, open-source audio editing software aka Audacity to accomplish just that by applying a Fade In and Fade Out effect to the beginning and end of an audio file.