Notes & Scales
Twelve notes, endlessly recycled. Every scale below is playable. Pick a home note to rebuild its scale, tap any degree to hear it alone, and watch the keyboard light the shape.
All twelve notes
One octave holds everything: seven letters plus five sharps/flats, a half step apart. Each note keeps one color everywhere in this app. Every black key wears both of its names: C♯ and D♭ are the same sound spelled for different keys.
Major scales
One formula, twelve homes: W–W–H–W–W–W–H. Pick a key and the scale rebuilds around it, degree by degree, octave included. Shapes mark three degrees: 1 wears the star, 3 the triangle, 5 the pentagon.
Minor scales
The minor formula: W–H–W–W–H–W–W. Minor lowers three degrees, ♭3, ♭6, ♭7, and solfège renames them me, le, te. Every minor key shares its notes with the major key three half steps up (its relative major). Harmonic minor raises the 7th back into a leading tone (ti) to pull harder toward home.
The circle of fifths
Neighbors on this wheel are a perfect fifth apart, and each clockwise hop adds one sharp to the key signature (counter-clockwise adds flats). Keys next to each other share six of their seven notes, which is why they feel like family. Tap any key: its seven notes stay lit, the home note glows, and its signature and scale appear below.