Audio Fade In/Out
Add smooth fade-in and fade-out effects to your music for professional transitions. Supports multiple curves.
Drag audio here to apply fade
100% Local • Multiple Curves (Linear, Log, Exp)
Audio Fade Use Cases
Frequently Asked Questions
Q. Which curve is recommended for fade out?
We recommend the Logarithmic curve. It most closely mimics how the human ear perceives sound decreasing, making it sound natural.
Q. Is there any quality loss when applying fades?
No. We only adjust the volume envelopes, so there is no loss in the actual audio data quality.
Q. Can I mute just the middle portion of the audio?
This tool handles fades at the start and end of the file. You can set independent times to achieve the desired effect.
Q. Is it possible to crossfade two songs?
For overlapping tracks, we recommend using our [Audio Merge] tool. This tool is optimized for single-file fade in/out.
Q. What are the ideal lengths for podcast intros and outros?
Typically, 1-2s for fade in and 2-3s for fade out sound the most professional and natural.
🌊 Audio Fade Curves Comparison
Each fade curve feels different based on the mathematical method used to change the volume.
| Curve Type | Mathematical Method | Sound Characteristic | Primary Use |
|---|---|---|---|
| Linear | y = x | Constant volume change | Short transitions, SFX |
| Logarithmic | y = log(x) | Most natural decay | Fade out standard |
| Exponential | y = xⁿ | Sharp start/end | Creative sound design |
| S-Curve | Sigmoid | Smooth acceleration/deceleration | Smooth BGM transitions |
| Equal Power | y = √x | Maintains perceived loudness | Professional crossfading |
📊 Recommended Fade Times by Genre
| Genre / Use Case | Fade In | Fade Out | Recommended Curve |
|---|---|---|---|
| Pop / Rock | 0.5 - 1.0s | 2.0 - 4.0s | Logarithmic |
| Classical | 2.0 - 3.0s | 4.0 - 6.0s | S-Curve |
| EDM / Dance | 0.1 - 0.5s | 1.0 - 2.0s | Linear |
| Jazz / Acoustic | 1.0 - 2.0s | 3.0 - 5.0s | Logarithmic |
| Ballad | 1.5 - 2.5s | 5.0 - 8.0s | Equal Power |
| Podcast / Voice | 1.0s | 2.0s | S-Curve |
| Video BGM | 2.0s | 3.0s | Logarithmic |
| Game BGM (Loop) | 0.5s | 0.5s | Equal Power |
Key Features
- Precise millisecond-level fade duration control
- 5 professional audio fade curves (Linear, Log, etc.) available
- Full support for MP3, WAV, and FLAC fade in/out
- 100% browser-based: Safe processing without server uploads
Add professional fade effects to your MP3 and WAV files with our online audio fade tool. Easily create audio fade in and audio fade out effects for professional music transitions and natural starts/ends.