このアプリについて
動画の再生速度と音程をそれぞれ完全に独立して自由自在に変更・編集できる、高機能な動画プレイヤー＆エディタアプリです。
リアルタイムでプレビューしながらクイック書き出しができる「プレイバックモード」に加え、タイムライン上に変更点を配置して滑らかな速度・音程変化を作れる「エディットモード」を搭載。フェーズボコーダーによる高音質化やフォーマント保持、5セント単位の微調整にも対応し、編集後はmp4形式でそのまま保存可能です。楽器練習や耳コピから動画制作まで、100%ローカル駆動の安全な環境で強力にサポートします。
動画編集
日常のちょっとした不便や手間を、独自のアイデアとシンプルな操作性でスマートに解消。
速度
余計な設定や登録は不要。起動してすぐに使えるストレスフリーな使いやすさを重視。
音程
バックグラウンド処理や省電力設計など、デバイスに優しく快適な動作を維持します。
フォルマント
ユーザーのプライバシーと安全を第一に考え、無駄な権限を要求しない安心の設計。
About This App
A powerful video speed changer, pitch shifter, formant shifter, and voice changer — freely control playback speed, pitch, and formant independently, live, without sacrificing audio quality.
Preserve natural vocal character while changing pitch, or shift formants independently to reshape vocal tone. Set AB Repeat loops to practice, trim, and export sections with or without video. Create smooth slow motion, natural tempo changes, and creative vocal effects.
Adjust pitch, speed, and formant while watching your video. What you hear is what you get.
* Speed Control: Slow down or speed up video without changing pitch.
* Pitch Shift with Formant Keep: Change pitch while preserving natural vocal character — avoiding the unnatural "chipmunk" effect.
* Formant Shift: Keep pitch unchanged while freely altering vocal character for subtle adjustments or dramatic effects.
* Free Formant Shift: Turn off Formant Keep to control formant independently during live playback.
* Practice Setlists (NEW): Build practice playlists with multiple tracks. Save individual speed, pitch, and formant settings per song ("Save Tune"), reorder via drag & drop, and toggle repeat modes (Off / All / One). Swipe horizontally or tap next/prev to switch songs seamlessly during rehearsal.
* 5-Band Equalizer: Fine-tune sound and restore frequency balance after pitch shifting.
* AB Repeat: Loop any A–B section for practice or detailed listening.
* Quick Export: Export instantly in MP4 with your adjustments preserved.
Place control points on the timeline to create dynamic speed, pitch, and formant curves.
* Smooth Transitions: Gradually accelerate, decelerate, rise, or drop pitch over any duration.
* Formant Automation: Adjust formant independently across the timeline for detailed voice editing.
* High-Quality C++ Phase Vocoder: Pristine sound quality even with extreme pitch or tempo changes.
* Microtonal Pitch: Long-press pitch labels for 5-cent precision, ideal for tuning adjustments.
* Text & TTS: Place text on the timeline and narrate using device TTS voices with custom speech settings.
* SRT Import: Import subtitle timing and text directly into the timeline as editable TTS items.
* Natural Speech Mixing: TTS audio is mixed independently of speed/pitch changes for crisp narration.
* Audio-Only Export: Long-press Export to save audio in M4A format without video.
Share any video directly from your Gallery, Files app, or other apps to start editing immediately.
* Musicians & Transcribers — Practice setlists with custom speed and key per song; slow down fast solos to transcribe fingering and phrasing.
* Performers & Content Creators — Create slow-motion videos and adjust vocal character for creative effects.
* Dancers & Athletes — Slow down crucial moments to analyze form and movement.
* Karaoke Lovers — Shift the key of any video without changing tempo.
* Voice Creators — Shift pitch or formant independently for versatile voice modulation.
* Language Learners — Slow down audio and adjust pitch for optimal listening comprehension.
A brief ad appears occasionally when loading or exporting. A one-time purchase removes all ads permanently. Every feature remains fully available to all users.
All processing happens entirely on your device. Your videos are never uploaded to any server.
App icon designed by Mostafiz — thank you!
■ Android Jetpack & Material Components — Apache License 2.0
■ Google Media3 (ExoPlayer & Transformer) — Apache License 2.0
■ KISS FFT — BSD 3-Clause License (Mark Borgerding)
Video editing
Solves daily inconveniences and tasks efficiently with smart ideas and simple controls.
speed
No complicated setups or registrations required. Enjoy stress-free usability right out of the box.
pitch
Optimized with lightweight background processing and low power consumption for daily use.
formant
Prioritizes user privacy and safety, requesting only the absolute necessary permissions.
デモンストレーション
アプリの主要な機能や実際の操作感を動画でチェック。
Demonstration
Check out the core features and user experience of the app in action.
ユーザーガイド & 使い方
詳しい設定や操作手順については、以下のスライド説明書をご覧ください。
User Guide & Instructions
For detailed settings and operation procedures, please refer to the slides below.
更新履歴
エクスポート予定サイズを表示するようにしました。
SRTの簡易エディタを実装
プレイバックモードに、プレイリスト機能を実装しました。
クリップ防止が暴れてブチブチとなるのを抑制しました。
srtファイル読み込み時に以下の独自タグで音声を制御可能にしました。 ・音声 <v XXX(voice name)> ・読上速度 <s 1.1> ・読上高さ <p 1.4> （例）<v ja-JP-language)><s 1.1><p 1.4> Hello!!
TTS埋め込み機能の精度向上（プレビューとエクスポートの音声ギャップの是正やジッタノイズ解消など）
プレビュー画面にズームバーとフリック（スクロール）を実装
プレビュー画面に「キーフレームを追加」ボタンを追加しました。 キーフレームにテキストを配置し、TTS（音声合成）で読み上げる機能を実装しました。 ユーザー様のご意見から、SRTファイルの読み込みに対応しました。有難うございます。
ユーザー様のご提案を受けてイコライザー機能を実装しました！ ピッチシフトと相性の良い機能だと思います！
R8解析を使用し、アプリのサイズやメモリ使用を最適化しました。
メディアプレイヤーの競合によるエクスポート中のフリーズを回避し、安定性を強化しました。
Pitch Tempo Changerの強化されたフェーズボコーダエンジンを移殖し、Editモードの音質を劇的に向上しました。
フォルマントシフト機能を実装しました。
機能を大幅に拡大・改善しました！ A-Bループ、A-B間のトリミングができるように ビデオファイルの共有先候補で本アプリが出るように オーディオオンリー出力モードの追加 フォルマントキープの精度向上
UIを更新。 プレイバックモードとエディットモードの区分性を強化しました。
横画面切り替えに対応しました。
リリース。動画ファイルの速さとピッチを独立してリアルタイムで変更します。 また、エディットモードではフェーズボコーダを用い、高音質な変換が可能。変更点をセットし、ピッチとテンポを個別にセットできます。また、スムージングトランジションにも対応。
Update History
We've added a feature to display the estimated export size.
Implemented a simple editor for SRT.
A playlist function has been implemented in playback mode.
We suppressed the erratic behavior of the anti-clipping function that was causing crackling sounds.
We have enabled audio control using the following custom tags when loading .srt files: ・Voice: `<v XXX(voice name)> ・Reading speed: `<s 1.1> ・Pitch: `<p 1.4> (Example) `<v ja-JP-language)><s 1.1><p 1.4> Hello!!`
Improved accuracy of the TTS embedding function (including resolving audio discrepancies between preview and export, eliminating jitter noise, etc.)
Implemented a zoom bar and flick (scroll) functionality on the preview screen.
Added a "Add Keyframe" button to the preview screen. Implemented a feature to place text on keyframes and have it read aloud via TTS. Added support for importing SRT files. Thank you for the suggestion!
We’ve implemented an equalizer function based on user suggestions! We think it pairs really well with the pitch-shifting feature!
Optimize app size and memory usage using R8 analysis.
We have enhanced stability by preventing freezes during export caused by media player conflicts.
We have ported the enhanced phase vocoder engine from Pitch Tempo Changer, dramatically improving the sound quality in Edit mode.
We have implemented a formant shift function.
We've significantly expanded and improved the functionality! Added A-B loop and A-B trimming capabilities. This app now appears as a suggested destination for sharing video files. Added an audio-only output mode. Improved formant keeping accuracy.
Updated the UI. Enhanced the distinction between playback mode and edit mode.
Landscape mode switching is now supported.
Released. This software allows you to independently change the speed and pitch of a video file in real time. In addition, in edit mode, you can set changes with high-quality sound using a phase vocoder, and then apply these changes through smoothing.
ユーザーレビュー・評価
Thanks for creating such a wonderful APK and for the incredible dedication behind every update. ⭐ ⭐ ⭐ ⭐ ⭐ ➕ Your talent, creativity, and hard work truly shine through. May your skills continue to inspire and benefit many users in the days ahead. Wishing great success, and a bright, fulfilling future!
Konnichiwa DS soft, this is actually best app, I wanted this, but when I change the pitch, it sounds weird, although it doesn't affect the edited song, that's good😉
I hope to learn a lot while trying various advanced features that the app provides. ● Possible improvement: file size increased too much while changing speed (only feature that I tried) which is undesirable at least for my use case.
funciona hasta ahora que lo instalo muy bien, es una execelente aplicación, mantenga el funcionamiento, agreguen poder hacer lista de reproducción y que se puedan poner los archivos en modo lista para ver los nombres de los vídeos a reproducir, si hay alguna versión pagá por favor pase la información como respuesta, gracias
Video Speed & Pitch Changer
it is always my first choice and best ever than all other app for simple to pro video pitch editing with its speed .
Thanks a lot for solving the freezing issue. However could not find how to open video files directly from other apps.as claimed by you. Would also highly appreciate if could try to add functionality to directly open a video from YouTube to change its speed or/and pitch for singing or recording.
👍🏻🙏🏻
That app was the best 🔥🔥 You just made what actually an user need. Too many app is in play store and it is the best from all of them . very easy very simple but very effective and user friendly. ❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️
kualitas audio pitch nya tidak bagus seperti music speed changer
User Reviews & Ratings
Thanks for creating such a wonderful APK and for the incredible dedication behind every update. ⭐ ⭐ ⭐ ⭐ ⭐ ➕ Your talent, creativity, and hard work truly shine through. May your skills continue to inspire and benefit many users in the days ahead. Wishing great success, and a bright, fulfilling future!
Konnichiwa DS soft, this is actually best app, I wanted this, but when I change the pitch, it sounds weird, although it doesn't affect the edited song, that's good😉
I hope to learn a lot while trying various advanced features that the app provides. ● Possible improvement: file size increased too much while changing speed (only feature that I tried) which is undesirable at least for my use case.
funciona hasta ahora que lo instalo muy bien, es una execelente aplicación, mantenga el funcionamiento, agreguen poder hacer lista de reproducción y que se puedan poner los archivos en modo lista para ver los nombres de los vídeos a reproducir, si hay alguna versión pagá por favor pase la información como respuesta, gracias
Video Speed & Pitch Changer
it is always my first choice and best ever than all other app for simple to pro video pitch editing with its speed .
Thanks a lot for solving the freezing issue. However could not find how to open video files directly from other apps.as claimed by you. Would also highly appreciate if could try to add functionality to directly open a video from YouTube to change its speed or/and pitch for singing or recording.
👍🏻🙏🏻
That app was the best 🔥🔥 You just made what actually an user need. Too many app is in play store and it is the best from all of them . very easy very simple but very effective and user friendly. ❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️
kualitas audio pitch nya tidak bagus seperti music speed changer
DS Soft のこだわり
既存のアプリでは手が届かないニッチな不便を、独自の技術と視点で解消します。不要な広告の削減や快適なインターフェース設計に真摯に取り組んでいます。
Our Commitment
We solve niche inconveniences that mainstream apps overlook with unique technology and perspective. We are truly committed to minimalist ads and comfortable user interface design.
今すぐ手に入れよう。
Get it now.