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

## What this tool does
Join multiple audio files into one — podcasts, voice memos, interview segments.

## Typical user problems
- Interview segments, voice memos, podcast episodes — recorded separately but belong together as one file.

## Parameters
- fmt: enum, optional. 输出格式

## 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
- 2-20 files, max 200 MB each
- Output format: MP3/WAV/M4A