# Audio Pitch Shifter (Keep Speed) — 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-pitch.yeezhan.com
Skill definition: https://audio-pitch.yeezhan.com/skill/SKILL.md
API documentation: https://audio-pitch.yeezhan.com/api/docs

## What this tool does
Shift a track up or down by up to 12 semitones for karaoke keys and transposition — duration unchanged.

## Typical user problems
- The backing track sits in the wrong key for the singer, or a voice-over needs a slightly deeper read. Resampling shifts pitch but drags the tempo with it — proper pitch shifting re-samples and then compensates the timing, so the song ends at exactly the same moment.

## Parameters
- semitones: number (range -12-12st), required. 移调（半音）

## 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