Course Progress
Progress is saved securely to your device. Learn in order or explore freely.
Your Dashboard
Pick up where you left off and track your mastery.
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Interactive Soundboard
Tap keys to hear high-fidelity tones using the Web Audio API.
Curated Lessons
Digestible, playable theory concepts from beginner to advanced.
Practice Lab
Interactive tools to visualize and construct musical elements.
Scale & Chord Builder
Choose a root, scale, or chord to begin.
Progression Engine
Select a key and progression type.
Interval Trainer
Calculate and hear the precise distance between notes.
Intervals measure the distance between two notes.
Rhythm Library
Tap a duration below to hear a pulse pattern in 4/4 time.
Whole, half, quarter, eighth, and sixteenth notes.
The Circle of Fifths
Clockwise adds sharps. Counter-clockwise adds flats. Tap any key to reveal its signature and diatonic footprint.
Circle of
Fifths
Fifths
Tap a key on the circle to inspect it.
Knowledge Check
Test your retention across intervals, scales, chords, and more.
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Daily Challenge
Five targeted questions to build your streak. Resets at midnight.
Today's Focus
Your daily challenge is ready.
Trophy Room
Badges earned by completing lessons, building streaks, and mastering the lab.