Pitch Tempo Changer Flash

Instantly adjust the pitch, tempo, and formant of your favorite tracks—all at once, all in real time—with Pitch Tempo Changer Flash, the lightweight and ultra-fast speed change, pitch shift, and voice changer tool!

Most pitch/tempo apps treat voice character as an afterthought. Flash puts formant control right alongside pitch and tempo—three sliders, all live, all instant, so you can transpose the key, change the speed/tempo, and reshape the voice all at once.

Designed for music lovers, dancers, musicians, and anyone who wants to hear their songs in a new way, this app strips away the wait so you can practice, play, and listen without interruption.

Key Features:

- Three Sliders, One Instant Sound: Pitch, tempo (speed), and formant—move any of them mid-playback and hear the change immediately. Now includes fine-tuning for cepstrum coefficients (formant detail setting) to achieve even cleaner voice adjustments.

- Zero Waiting Time: Fast startup, optimized ad performance, and no waiting for files to convert. The "Flash" engine loads your tracks instantly.

- Make Any Song Sound Cute (or Deep, or Totally Different): Turn up the formant for a lighter, cuter voice—or push it down for something deeper and darker. A fun new way to enjoy the music you love, remix a vocal for karaoke night, or just mess around.

- Multiple Setlists & Playlists: Create and manage custom playlists! Organize your tracks for driving, relaxing, transcription, karaoke, or intense woodshedding sessions.

- Background Playback: Keeps playing smoothly in the background, even alongside other music/radio apps. Note: if another app also plays audio, lock-screen controls may show that app instead.

- Support Us & Go Ad-Free: Remove ads forever with a one-time purchase about the price of a cup of coffee. Your support keeps the app fast, updated, and bug-free!

For Everyday Use:

Whether mastering a guitar riff, slowing a choreography track, transposing a song to your vocal range, or turning a vocal cute for fun, this app is your ultimate practice partner—and playground.

Looking for more HQ sounds?

This app's formant shift is simple and semitone-based, built for speed. For finer control or offline conversion, check out our full-featured app, "Pitch Tempo Changer."

Under the Hood:

Real-time formant shifting via Android's standard pitch-shift/time-stretch requires chaining it in series with that engine. In such a serial chain, downstream formant shift (after pitch/time-stretch) is the standard approach, since it favors detail preservation.

Flash instead applies it upstream to prioritize real-time performance—now enhanced with adjustable cepstrum coefficients for fine formant control while minimizing processing load.

Processing Flow

[Original Audio] → [Formant Shift with Cepstrum Fine-Tuning (Custom)] → [Pitch Shift / Time Stretch (Android Standard)] → [Audio Output]

Our full app, "Pitch Tempo Changer," shifts formant downstream instead, prioritizing detail — give it a listen and compare.

Open Source Licenses & Attributions:

This application incorporates open-source software. Attributions and license details for the libraries used are as follows:

- AndroidX Media3 (including ExoPlayer)

Licensed under the Apache License, Version 2.0 (the "License").

You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0

- AndroidX Support Libraries (AppCompat, ConstraintLayout, Activity)

Licensed under the Apache License, Version 2.0.

- Google Material Components

Licensed under the Apache License, Version 2.0.

- JTransforms

Copyright (c) 2007 onward, Piotr Wendykier. All rights reserved.

Licensed under the BSD 2-Clause License.

You may obtain a copy of the License at: https://opensource.org/licenses/BSD-2-Clause

- JLargeArrays

Copyright (C) 2006-2019 University of Warsaw, ICM

Copyright (C) 2020 onward visnow.org

Licensed under the BSD 2-Clause License.

You may obtain a copy of the License at: https://opensource.org/licenses/BSD-2-Clause