ToneFlux: Music Speed & Pitch

Dongfu He

About this app

ToneFlux is an essential music workstation designed for musicians, students, and audio enthusiasts. It allows you to change the playback speed of audio files in real time without affecting the pitch (time stretch), or to change the pitch without altering the tempo (pitch shift). You can also link both controls to adjust tempo and pitch simultaneously.

More than just a speed changer, ToneFlux serves as a powerful practice looper. Isolate difficult sections of a song to practice at your own chosen speed and loop them seamlessly. Need to hear an intricate guitar solo clearly? Slow it down and add markers. Need to sing in a different key? Pitch it up or down instantly. Everything happens locally with zero decoding wait times and high-quality audio processing.

When you're happy with your adjustments, export your edited audio straight to your device to share, use as a custom ringtone, or practice on other media players.

Features:
• Pitch Shifting: Transpose audio pitch up or down smoothly. Supports fractional semi-tones.
• Time Stretching: Change audio speed (BPM) effortlessly without altering the key.
• AB Looper: Seamlessly loop specific sections of any track. Great for focused practice.
• Interactive Markers: Bookmark key positions in a piece of music to jump back to them easily.
• Auto-Detection: Automatically analyzes source BPM and musical key to get you started quickly.
• Equalizer: Fine-tune audio output with an 8-band graphic equalizer and built-in preamp.
• Audio Effects: Real-time echo, flanger, reverb, and stereo panning controls.
• Universal Support: Opens most local audio files found on your device.
• Export Function: Save your altered track or loop segment directly to a local audio file.
• Workstation Engine: Native Android UI built with Jetpack Compose featuring a smooth, responsive dark/light mode experience.
• Project Save: Save your speed, pitch, and loop settings per song to resume your session later.

Whether you're practicing an instrument, making Nightcore edits, listening to fast audiobooks, or just transcribing a fast-paced solo, ToneFlux is your ultimate audio practice tool.

What’s new

First version