About This App

Instantly adjust the pitch, tempo, and formant of your favorite tracks in real time with Pitch Tempo Changer Flash—the lightweight, ultra-fast pitch shift, speed change, and voice changer tool!
Most pitch/tempo apps treat voice character as an afterthought. Flash puts formant control right alongside pitch and tempo—three live sliders so you can transpose keys, change playback speed, and reshape vocal character all at once.

Designed for musicians, dancers, students, and music lovers, Flash strips away the wait so you can practice, play, and listen without interruption.

- Three Sliders & 'Keep Voice Character': Move pitch, tempo (speed), and formant mid-playback for immediate results. Enable 'Keep Voice Character' to automatically counter-shift formant when transposing pitch, preventing unnatural chipmunk or monster effects while preserving original vocal timbre without percussion bleeding.
- Formant Advanced Settings & [Auto] Tuning: Tap the expandable advanced section to fine-tune Voice Texture (cepstrum 50–120), Soft Liftering (eliminates metallic ringing), Vocal Cavity resonance protection, and Dynamic Pitch (F0) protection. Tap [Auto] while vocals play to instantly measure and apply optimal texture!
- Retro Resizable Workspace: Custom tactile splitter handle between the setlist and control deck. Slide with a vintage audio grip to adjust screen space to your liking. Double-tap to reset to default; your preferred layout is automatically remembered.
- Per-Track Memory & Custom Setlists: Create and organize custom playlists! Flash remembers every track's individual pitch, tempo, formant, and advanced settings, instantly restoring them upon selection.
- Zero Waiting Time & Zero-Stutter Engine: Fast startup, pre-allocated audio buffers that eliminate GC audio dropouts, and instant track loading with zero file-conversion wait times.
- Handy WAV Export: Need to save your tuned track? Simply long-press any song in your playlist to export it as a WAV file directly to your Download folder with current pitch, tempo, and formant applied!
- Make Any Song Sound Cute or Deep: Turn up formant for a lighter, cuter voice, or push it down for something deeper. Great for karaoke practice, remixing, and ear training.
- Background Playback: Keeps playing smoothly in the background, even alongside other audio apps.
- Support Us & Go Ad-Free: Remove ads forever with a one-time purchase. Your support keeps the app fast, updated, and bug-free!

Whether mastering a guitar riff, slowing a choreography track, transposing a song to your vocal range with natural timbre, or exploring fun voice shifts, Flash is your ultimate practice partner—and playground.

Looking for more HQ sounds?
Flash is optimized for ultra-fast, zero-latency real-time playback. For studio-grade fidelity, check out our flagship sibling app, 'Pitch Tempo Changer.' Powered by an advanced Phase Vocoder, it delivers pristine transformations with minimal loss, virtually no phase smearing, offline batch export, and microtonal tuning.

Flash uses an optimized upstream DSP pipeline for zero-allocation, stutter-free performance. The upgraded formant engine integrates Soft Liftering (Cosine Taper window) to eliminate metallic ringing, Catmull-Rom spline interpolation, dynamic F0 pitch protection, and percussion gating to prevent drum hits from distorting vocals.

- AndroidX Media3 & AndroidX Support Libraries (Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0)
- Google Material Components (Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0)
- JTransforms & JLargeArrays (BSD 2-Clause: https://opensource.org/licenses/BSD-2-Clause)