> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tessact.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Audio fades

> Create click-free boundaries and deliberate transitions with constrained fade handles.

Audio fade-in and fade-out durations are stored in seconds on audio and audio-capable video layers. Timeline handles edit these values visually.

## Gain function

At each layer-local frame, the editor calculates a fade multiplier and multiplies it by the decibel-derived base gain:

```text theme={null}
final volume(frame) = 10^(dB / 20) × fadeMultiplier(frame)
```

The fade-in rises from silence to full base gain; the fade-out falls back to silence.

## Constraints

Fade handles are constrained by the layer duration, the opposite fade, and a minimum one-frame gap between the two regions. The configured maximum is effectively unbounded; the active clip and opposite handle impose the practical limit. This prevents the fades from crossing or consuming the complete interval ambiguously.

## Split and trim behavior

Splitting partitions fade responsibility: the new internal boundary should not inherit an unintended full-clip fade from both sides. Trimming and extending clamp fade values to the new duration. Always recheck the curves after a structural edit.

## Suggested uses

* `1–2` frames or a very short time for click suppression.
* A few tenths of a second for natural ambience entrances.
* Longer fades for music or deliberate scene transitions.

<Warning>
  A long fade is not a substitute for mixing automation across dialogue. It changes the entire transition region and can make the midpoint quieter than expected.
</Warning>

See [timeline fades](/editor/timeline/audio-fades) and [volume](/editor/audio/volume).