Pitch Tempo Changer

[ ALL FEATURES FREE & NO FULL-SCREEN ADS FOR BASIC USE ]
- Basic Features (Pitch & Tempo): 100% FREE with NO full-screen ads during standard operations.
- Advanced Options: Extra features are also FREE to use. Full-screen ads may appear only when accessing these options. Permanent ad-removal is available for a small, one-time fee.

This app allows you to load audio (WAV/MP3) and play or save it in MP3/WAV format while independently adjusting the pitch, tempo, and formant. Equipped with playback marking and repeat features, it is the perfect tool for transcribing music by ear or practicing languages.

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

● Our Commitment to Audio Quality
Note: Supports wide adjustment range (25%–400% tempo / ±1 octave pitch). Due to the nature of digital audio, extreme settings may result in artifacts, which can often be mitigated by enabling ”High Quality Mode” in the options menu.

1. Automatic Frequency Compensation: Automatically compensates for weak bass when pitch is raised or weak treble when lowered, mitigating common shifter issues.
2. Attack Clarity Enhancement: Suppresses the "doubling" effect often heard in the attack of drums and percussion when altering pitch or tempo.
3. Flexible Export Settings (Updated June 2026): Select MP3 bit rates from 96 to 320 kbps, or export lossless WAV files to find your perfect balance between storage space and audio quality.
4. Formant Shift: Natural-sounding voice transformation via our C++ engine (Updated April 2026). Adjust "Voice Texture (Cepstral)" to change voice resolution—higher for rich ensembles, lower to eliminate solo noise. The "Auto" button instantly calculates the ideal texture.
・ Advanced Formant Detail Controls (June 2026):
- Cepstral Envelope Fade: Smooths transitions near cepstral coefficients for natural results. (Off: more pronounced formant changes, but may sound unnatural.)
- High-Frequency Protection: Prevents over-processing of high-frequency audio. (Off: full formant shift extends to upper range, potentially making breath noise or cymbals harsh.)
- Low-Energy Frame Bypass: Skips silent frames to avoid noise amplification. (Off: full-intensity formant shifting applied at all volume levels.)
5. Vocal Extraction & Removal: Center-cancel function to extract or remove vocals. (Does not apply to tracks where vocals are panned fully left or right.)
6. Track Decomposition: Analyzes and isolates sounds based on their stereo positioning/panning. (Precision depends heavily on original audio quality.)
7. Micro-Pitch, Micro-Formant (Apr. 2026): Precision shifting in 5-cent increments (1/20th of a semitone). Perfect for correcting digitized vinyl/tape drift or fine-tuning instruments without losing character.
8. High-Quality Mode: Advanced mode using Phase Vocoder for clearer changes while maintaining sound richness. (Requires more processing time).
9. Spot Pitch Correction: Select specific waveform areas and apply pitch correction only to those spots. Video Guide: https://youtube.com/shorts/I1BFM18fjDw
10. Practice Session Save (April, 2026): Save perfect practice settings as presets, store custom adjustments, and bookmark specific playback ranges/loop points per song.

Professional processing made easy without a DAW.

[ Need a Faster, Lightweight Player for Practice? ]
If you don't need advanced editing (formant shifting/micro-tuning) and want to eliminate file loading times, try our spin-off version: "Pitch Tempo Changer Flash." It is optimized for instant real-time playback, background listening, and multiple setlists—perfect for daily music appreciation, dance, or instrument practice!

[ PRIVACY & PERFORMANCE ]
All processing is performed 100% locally on your device. No data is sent to servers, ensuring total privacy. (Note: Processing speed depends on your device's hardware specs.)

[ COMMUNITY ]
Special thanks to Mostafiz for the beautiful app icon!