What is
What is Fade In / Fade Out?

Fade in and fade out are useful when an audio clip starts too suddenly or ends too sharply. A short fade can make ringtones, intros, outros, and voice clips sound more polished.
Long fades can remove more of the beginning or ending than expected. Preview the transition before saving the MP3 or WAV file.
Use the available controls to adjust the result, listen before saving, and download a new file when you are satisfied.