Pitch Tempo Changer

[ ALL FEATURES FREE & NO FULL-SCREEN ADS FOR BASIC USE ]

■ Basic Features (Pitch, Tempo & Formant): 100% FREE, with no full-screen ads during standard use. Adjust Pitch, Tempo, and Formant directly from the main-screen sliders.

■ Advanced Options: Also 100% FREE. Occasional full-screen ads may appear only when opening advanced settings. Permanent ad removal is available with a small one-time purchase.

This audio & video speed changer and pitch shifter lets you import MP4, MKV, WAV, and MP3 files, extract audio for waveform editing, and play or export as MP3/WAV while independently adjusting Pitch, Tempo, and Formant.

With A-B looping, playback marking, waveform editing, and vocal processing, it is ideal for music transcription, vocal practice, dance routines, language learning, and audio analysis.

User Guide:
https://docs.google.com/presentation/d/1-CiSm_HoQ2uj7i5kC6GYXp-t2trgR2VpggGeFxr0b3Q/preview

● RECOMMENDED FOR

・Musicians & Transcribers: Slow down fast solos, change keys for vocal covers, isolate instruments, and practice ear training.

・Singers & Vocalists: Transpose backing tracks to your vocal range, practice karaoke, and change vocal character with formant shifting.

・Dancers & Choreographers: Slow down video audio to practice dance steps and choreography.

・Language Learners & Students: Adjust speech speed for listening practice, dictation, podcasts, and audiobooks without changing pitch.

● AUDIO QUALITY & CORE FEATURES

・Wide Range: 25%–400% tempo and ±1 octave pitch adjustment.

・Three Core Sliders: Pitch, Tempo, and Formant are available directly on the main screen.

・Video Import: Import MP4/MKV, extract audio, edit Pitch/Tempo/Formant, and export as MP3/WAV—no separate converter required.

・Automatic Frequency Compensation: Restores weak bass on pitch-up and thin treble on pitch-down.

・Attack Clarity Enhancement: Suppresses "doubling" artifacts on drum and percussion attacks.

・Flexible Export: Lossless WAV or MP3 at 96–320 kbps.

● ADVANCED VOCAL & FORMANT ENGINE

Our C++-powered DSP engine provides detailed control over vocal character while maintaining natural-sounding results.

・Natural Formant Shift: Change vocal character and perceived voice characteristics without changing pitch.

・Voice Texture (Cepstral): Adjust envelope resolution, with Auto available.

・Vocal Cavity Protection: Prevents unnatural vocal tract and mouth scaling during formant shifts, reducing "giant mouth" artifacts.

・Cepstral Envelope Fade: Smooths spectral peak transitions.

・High-Frequency Protection: Prevents excessive processing of breath sounds and cymbals.

・Low-Energy Frame Bypass: Skips quiet frames to prevent background noise amplification.

・Pitch Protection: Prevents melody breakdown from unnatural high-frequency pitch or harmonic shifts. (2026/8 new!)

● PRACTICE & EDITING TOOLS

・Vocal Remover & Extractor: Center-channel cancellation to remove or isolate lead vocals. Results depend on the source.

・Track Decomposition: Isolate sounds based on stereo positioning.

・Micro-Pitch / Micro-Formant: 5-cent (1/20 semitone) precision for tape/vinyl drift, instrument tuning, and microtonal adjustments.

・High-Quality Mode: Phase Vocoder processing for clearer time-stretching and richer harmonic detail.

・Spot Pitch Correction: Correct pitch only in selected waveform areas.
Guide: https://youtube.com/shorts/I1BFM18fjDw

・Practice Session Save: Save loop points, bookmarks, presets, and song-specific settings.

Professional audio processing on mobile—no DAW required.

● 100% LOCAL PROCESSING & PRIVACY

All audio and video processing is performed locally on your device. Your media files are not uploaded to a server for processing.

[ NEED A LIGHTER PLAYER FOR QUICK PRACTICE? ]

Try our lightweight spin-off, "Pitch Tempo Changer Flash"—designed for instant playback, background listening, and multiple setlists without complex editing.

[ COMMUNITY ]

Special thanks to Mostafiz for the beautiful app icon!

Recent changes:
internal code optimization (R8 obfuscation support).
Further revamped the implementation of HQ mode.
Significantly overhauled the HQ mode implementation (reducing audio graininess and hissing/fizzing noise).
Implemented automatic correction of cepstral coefficients (pitch protection mechanism).
Basic formant shifting has been upgraded to a core feature and is now available ad-free.
Fine-tune UI.
Enhanced stability.
Supports loading video files.

* The new icon is a gift from a wonderful user!!