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:
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.
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.
