Tonality Visualizer
See tonality in real time
Free · Designed for iPad
Tonality Visualizer is an interactive polar-pitch map that displays musical notes on a rotating disk.
You can connect a MIDI keyboard or open a MIDI file — every note appears in real time.
The app helps you see harmony, motion, and chord relationships, even without formal music theory.
Main Features
•MIDI Input: visualize notes directly from your keyboard or MIDI device.
•MIDI File Playback / Trainer Mode: play or practice chord by chord.
•Live Sound Option: enable/disable the built-in synth for input playback.
•Physics-based Disk Rotation: the disk moves naturally according to musical torque.
•Simple UI: switch between water-fixed / disk-fixed anchors, toggle UI visibility, bilingual JP/EN.
Perfect for music learners, creators, and anyone who wants to “see” sound.
Privacy
No data collection. All processing happens locally on your device.
License
Open-source under the MIT License. Source code available on GitHub.
Supported Formats
•.mid / .midi files (Format 0 / 1)
•CoreMIDI device input
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
Added guide lines (concentric arcs)
Updated the notation of note guide numbers
The developer, Yusuke Yoshida, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yusuke Yoshida
- Size
- 683 KB
- Category
- Music
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - iPad
Requires iPadOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.6 or later.
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2025 Yusuke Yoshida