Circle of Fifths

What is Circle of Fifths?

Circle of Fifths is an interactive music theory platform for musicians, composers, and teachers. Tap keys to read signatures, compare relative and parallel minors, and see shared chords. Hear piano or guitar voicings, build progressions by dragging diatonic chords, and export MIDI, chord charts, or handouts. Scenario-based suggestions and practice modules include songwriting templates, modulation roadmaps, quizzes, and ear-training drills. Teachers can create annotated lessons, assign exercises, and track student progress. The tool turns Circle of Fifths theory into practical, playable decisions for rehearsal, composition, and classroom use.

Key features

• Select any key to reveal signatures, scale degrees, and harmony tags.
• Trigger piano or guitar voicings to hear single notes, chords, loops.
• Drag diatonic chords to assemble progressions and save reusable templates.
• Visualize modulation routes with pivot chords and stepwise modulation tips.
• Practice with quizzes, ear training drills, and tracked performance metrics.
• Export MIDI, chord charts, and class handouts for composition or teaching.