Add fade in and fade out

A fade is a gradual change in volume applied to the actual audio samples: a fade-in ramps the level up from silence at the start, and a fade-out ramps it down to silence at the end. It's not a trim or a cut — the audio still plays for its full length, but the opening and closing seconds rise or fall in loudness instead of jumping in and out at full volume. Because the change is baked into the waveform, the effect travels with the file to any player, DAW, or upload without needing metadata or a special app.

Suno and other AI generators often stop on an abrupt hard cutoff, or start with a split-second of noise before the first note lands, and a fade smooths both edges so the track feels finished rather than clipped. Creators reach for fade in and fade out when prepping a song for streaming, layering it under a video, or building a seamless loop, since ears register a clean rise and decay as intentional production rather than a rough export. It's one of the quickest ways to make a raw generation sound mastered without touching the arrangement itself.