# Bass / Treble Equalizer — 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-eq.yeezhan.com
Skill definition: https://audio-eq.yeezhan.com/skill/SKILL.md
API documentation: https://audio-eq.yeezhan.com/api/docs

## What this tool does
Boost or cut bass and treble ±20 dB — warm up thin phone recordings or tame harsh highs.

## Typical user problems
- Phone and laptop microphones record thin and bass-shy, while old rips can be dull or piercing. Two shelf EQ bands — low shelf at 110 Hz, high shelf at 6 kHz — reshape the tone in seconds, delivered as a ready-to-share MP3.

## Parameters
- bass_db: number (range -20-20dB), required. 低音增益
- treble_db: number (range -20-20dB), required. 高音增益

## 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