Clef - Music Theory

New design and login features.

Clef turns music theory into a game

• REAL SHEET MUSIC READING Not just quizzes: learn to read real sheet music in treble and bass clef, with exercises that build real skill — rhythm, scales, harmony and more.

• TRAIN YOUR EAR Intervals, chords, cadences, perfect pitch — recognize music by ear, with a real audio engine (no generic sound effects).

• SING IN TUNE Use your microphone to practice pitch-matching, with real-time feedback.

• PROGRESS LIKE A GAME Levels, streaks, hearts, gems, badges — plus a real weekly league and clubs to practice alongside other players. A "Review Mistakes" mode brings back exactly what you got wrong, so it actually sticks.

• PICK YOUR INSTRUMENT Piano, guitar, violin, trumpet, voice... Clef adapts sounds and exercises to your instrument.

• English and French, letter names (C D E) or solfège (Do Re Mi) — whichever you prefer.

Free to learn. No ads.