# Audio Volume Booster — 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-boost.yeezhan.com
Skill definition: https://audio-boost.yeezhan.com/skill/SKILL.md
API documentation: https://audio-boost.yeezhan.com/api/docs

## What this tool does
Raise or lower recording volume by −30 to +30 dB and export as MP3 — fix phone recordings that are too quiet.

## Typical user problems
- The interview came out barely audible and the lecture recorder whispered. A fixed dB gain lifts the whole recording uniformly — louder without re-recording, delivered as an MP3 anything accepts.

## Parameters
- gain_db: number (range -30-30dB), required. 增益（dB）

## 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 200 MB