Tonality Visualizer

Name: Tonality Visualizer
Author: Yusuke Yoshida

See tonality in real time

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📚 Education

🎵 Music

Free

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Updated
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October 17, 2025
August 1, 2026
1.5.10
iOS 18.6+
4+
795KB
iPhone, iPad
5 days ago
American English

Features

Developer

Yusuke Yoshida

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About

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

What's New in Tonality Visualizer

1.5.10

August 1, 2026

■ Custom chord notation Added custom chord notation based on DarkAngle, K1, K1→K2 movement, K2 scale degree, and BrightAngle. Displayed the K2 movement as a small center value with a minus sign for negative movement. ■ K1 / K2 Improved K2 movable-do display. Improved the K2 region in Disk Lock mode. Kept K1, K2, DarkAngle, BrightAngle, and custom chord notation consistent across display modes. ■ MIDI playback Added playback speed control. Added show/hide playback controls. Improved playback control layout. ■ Chord capture Added manual chord capture during MIDI playback. Added text export. Added export options for time signature and MIDI start beat. Added one chord per line and one measure per line export formats. Added selectable export fields. ■ Section markers Added A, B, C, and D section markers. ■ Keyboard Added keyboard size adjustment. Added white key outlines. Improved screen layout. ■ Chord analysis Improved chord analysis. Improved chord candidate display. ■ MIDI Improved MIDI input handling. Improved live input and MIDI playback processing. Updated the sample MIDI. ■ Other Fixed unintended iOS double-tap behavior. Improved UI and layout. Fixed various issues.