HarmoniExtra

Requires PythonExtra runtime and CInput library. Install both before using this application.
CInput: https://classpaddev.github.io/store/p/cinput | Direct download: https://raw.githubusercontent.com/TheRainbowPhoenix/MiscPythonExtra/master/cinput.py

HarmoniExtra is a comprehensive music theory reference tool for the CASIO ClassPad II. Explore scales, view guitar chord diagrams, and visualize notes on piano keyboard and musical staff. Perfect for musicians learning theory on the go.

Features

• Scale explorer: 15+ scale types including Major, Minor, Modes, Pentatonic, Blues, and more
• Guitar chord library: 20+ chord qualities with multiple voicings and barre shapes
• Piano visualization: interactive keyboard display showing scale notes
• Staff notation: treble clef rendering with proper accidentals
• Note naming: toggle between flat (♭) and sharp (♯) notation
• Root selection: tap any of 12 chromatic notes to transpose
• Chord variants: cycle through alternative fingerings for guitar chords

Pages

• Main: Scale notes display with piano keyboard
• Piano Chords: Musical staff notation with keyboard reference
• Guitar Tabs: Fretboard diagrams with fingering positions

Controls

Scales Included

Major, Minor (Aeolian), Dominant (Mixolydian), Dorian, Phrygian, Lydian, Locrian, Harmonic Minor, Melodic Minor, Pentatonic Major/Minor, Blues, Whole Tone, Diminished, Augmented

Guitar Chords

Major, Minor, 5, 7, Major 7th, Minor 7th, Sus2, Sus4, 6, m6, Add2, Add9, 9, m9, Maj9, 7sus4, 9sus4, Dim, Dim7, Aug, m7b5, 11, m11, 13, m13

Requirements

• CASIO ClassPad II (fx-CP400)
• Hollyhock-3 firmware
• PythonExtra runtime
• CInput library (required for menus and dialogs)

A practical music theory companion for students and musicians.