音声速度・ピッチ変更
スピード & ピッチ
TIME-STRETCH DSP⚡ ブラウザのみ Phase Vocoder · 速度とピッチを独立調整MP3 / WAV / FLAC 対応
制作向けピッチ＆スピードスタイルガイド
[プレビュー]ノーマルリセット
1.00x オリジナル · 0 半音
Nightcore+2st / 1.25x
1.25x 高速 · +2 全音の明るいリフト
Slowed & Reverb-2st / 0.85x
0.85x スロー · -2 温かいリバーブの雰囲気
Chipmunk+6st / 1.10x
1.10x 速度 · +6 鋭いチップマンク調
Titan Sub-5st / 0.95x
0.95x 速度 · -5 深いサブベースの重み
ABOUT THIS TOOL
Free Online Audio Speed & Pitch Changer
Slow down tracks for transcription, speed up practice loops, or shift pitch without changing tempo — and vice versa. Processing runs locally via Web Audio API for private, instant adjustments.
How it works
- 01Upload an audio file or select one from Library after sign-in.
- 02Adjust speed and pitch sliders independently — preview changes in real time.
- 03Fine-tune for practice, harmonic mixing prep, or vocal transposition workflows.
Key features
- Independent speed and pitch control
- Real-time preview in the browser
- Local processing — files are not sent for analysis
- Useful for DJ tempo matching and musician practice
Common questions
Yes. Speed and pitch are controlled separately so you can slow a track for learning without lowering the key, or transpose without altering BPM.