# Audio Fade In / Out — yeezhan.com
> One-time pay-per-task emergency tool to make your file ready for submission.
> No credits, no balance. One payment unlocks one task result, valid for 24 hours.

Tool domain: https://audio-fade.yeezhan.com
Skill definition: https://audio-fade.yeezhan.com/skill/SKILL.md
API documentation: https://audio-fade.yeezhan.com/api/docs

## What this tool does
Add smooth fade-in and fade-out to any audio — podcast intros, ringtone endings.

## Typical user problems
- Abrupt starts and ends make amateur-sounding audio.

## Parameters
- fade_in: number (range 0-30), optional. 淡入时长（秒）
- fade_out: number (range 0-30), optional. 淡出时长（秒）

## Pricing
- Watermarked preview: free, no login required
- Final clean output: $0.99 one-time per task
- Require login (email/phone OTP) to complete payment
- Result available for download 24 hours after payment

## Limitations
- Max input 200 MB