# Music Genius > Music Genius is a free, browser-based platform for learning music theory and training your ear through 10 short, gamified drills and a Duolingo-style curriculum called Theory Quest. It covers scales, chords, key signatures, intervals, chord progressions, rhythm, sight reading, and pitch recognition. Free to play in any modern browser; a Pro tier ($4.99/mo or $39.99/yr) unlocks unlimited Time Trial mode and global leaderboards. Music Genius is designed for self-taught musicians, piano and guitar learners, music students, and producers who want short daily practice that actually sticks. Each game is a focused 1–3 minute drill; Theory Quest stitches the underlying concepts into a structured 72-skill path with bite-sized lessons. ## Curriculum - [Theory Quest curriculum](https://musicgenius.app/learn): A 72-skill Duolingo-shaped learning path covering music theory from absolute basics (notes, half steps, whole steps) through scales, intervals, key signatures, diatonic chords, chord progressions, modes, and seventh chords. Each unit ends in a Boss Run that routes into one of the games for hands-on practice. Includes a Mistakes Inbox that surfaces the exact concepts you keep getting wrong. ## Reference - [Scale Library](https://musicgenius.app/scales): Reference pages for every scale in Western music (major, minor, modes, pentatonic, harmonic minor, melodic minor, blues) across all twelve roots — 144 scale pages total, each with notes, intervals, diatonic chords, relative key, and an interactive piano keyboard you can play. - [Chord Library](https://musicgenius.app/chords): Reference pages for every common chord type (major, minor, diminished, augmented, maj7, m7, dominant 7, half-diminished, diminished 7, sus2, sus4) on all twelve roots — 132 chord pages total, each with notes, intervals, and an interactive piano keyboard. ## Games - [Build the Scale](https://musicgenius.app/build-the-scale): Click the correct notes on a piano keyboard to build a given scale (major, minor, modes, pentatonic). Teaches scale construction by interval pattern. - [Fix the Scale](https://musicgenius.app/fix-the-scale): One note in a scale is wrong — find and fix it. Forces you to internalize what each scale *sounds* and *looks* like, not just memorize note names. - [Build the Chords](https://musicgenius.app/build-the-chords): Construct triads and seventh chords on the keyboard from a chord symbol. Covers major, minor, diminished, augmented, and seventh-chord qualities. - [Name the Key](https://musicgenius.app/key-signatures): Identify the major or minor key from its key signature (sharps and flats on a staff). The fastest way to memorize the circle of fifths. - [Pitch ID](https://musicgenius.app/ear-training): Ear-training drill — hear two notes and identify the interval between them, or hear a chord and identify its quality. Builds relative pitch. - [Name That Tune](https://musicgenius.app/song-guesser): Identify well-known melodies from short audio clips. Trains melodic memory and pattern recognition. - [Tone Match](https://musicgenius.app/tone-match): Match a target pitch by ear. Trains absolute pitch awareness and fine-grained frequency discrimination. - [Scale Runner](https://musicgenius.app/scale-runner): A side-scrolling platformer where you jump on the correct scale degrees to clear pits. Pairs spatial reasoning with scale knowledge. - [Rhythm Tap](https://musicgenius.app/rhythm-tap): Tap rhythms in time with a click track. Trains subdivision, syncopation, and groove. - [Sight Read](https://musicgenius.app/sight-read): Read notes on the staff and play them on a piano keyboard before the timer runs out. Trains fluent staff reading in treble and bass clef. ## Articles (evergreen music-theory explainers) - [The Circle of Fifths Explained Simply](https://musicgenius.app/blog/posts/circle-of-fifths-explained/): A plain-language walkthrough of the circle of fifths, how to read it, and how to use it for songwriting. - [How to Memorize Key Signatures](https://musicgenius.app/blog/posts/how-to-memorize-key-signatures/): Mnemonics and patterns for learning all 15 major and minor key signatures. - [How to Build Chords](https://musicgenius.app/blog/posts/how-to-build-chords/): From triads to seventh chords — how chord quality comes from stacked intervals. - [Chord Inversions Guide](https://musicgenius.app/blog/posts/chord-inversions-guide/): What chord inversions are, how to read figured bass shorthand, and why bass-line voice leading matters. - [Diatonic Chords Explained](https://musicgenius.app/blog/posts/diatonic-chords-explained/): Why every key has exactly 7 chords and how to derive them. - [Seventh Chords Explained](https://musicgenius.app/blog/posts/seventh-chords-explained/): Major 7, dominant 7, minor 7, half-diminished, and fully diminished — what makes each unique. - [Roman Numeral Analysis](https://musicgenius.app/blog/posts/roman-numeral-analysis/): The universal shorthand for chord function; lets you transpose any progression instantly. - [Nashville Number System](https://musicgenius.app/blog/posts/nashville-number-system/): Numeric chord notation used by working musicians for fast key changes. - [Major vs Minor Scales](https://musicgenius.app/blog/posts/major-vs-minor-scales/): The interval pattern that creates each mood, and how to switch between them. - [Harmonic vs Melodic Minor](https://musicgenius.app/blog/posts/harmonic-vs-melodic-minor/): The three forms of minor and when each is used. - [Pentatonic Scale Guide](https://musicgenius.app/blog/posts/pentatonic-scale-guide/): Why 5-note scales sound so universally good and how to use them. - [The Seven Music Modes Explained](https://musicgenius.app/blog/posts/seven-music-modes-explained/): Ionian through Locrian — character, interval pattern, and use cases. - [Music Intervals Guide](https://musicgenius.app/blog/posts/music-intervals-guide/): All 13 interval qualities with audio examples and ear-training tips. - [Tritone — The Devil's Interval](https://musicgenius.app/blog/posts/tritone-devils-interval/): Why the augmented fourth was historically avoided and how modern music uses it. - [Half Steps and Whole Steps](https://musicgenius.app/blog/posts/half-steps-and-whole-steps/): The fundamental building blocks of every scale. - [Relative Major & Minor Keys](https://musicgenius.app/blog/posts/relative-major-minor-keys/): How every major key shares a relative minor and why that matters for songwriting. - [Note Values & Time Signatures](https://musicgenius.app/blog/posts/note-values-and-time-signatures/): Whole notes to thirty-seconds, plus how time signatures organize the pulse. - [Reading the Treble Clef](https://musicgenius.app/blog/posts/reading-the-treble-clef/): A beginner's guide to reading notes on the treble staff. - [How to Read Sheet Music](https://musicgenius.app/blog/posts/how-to-read-sheet-music/): An end-to-end primer covering staff, clefs, notes, rests, accidentals, and rhythm. - [How to Practice Scales](https://musicgenius.app/blog/posts/how-to-practice-scales/): Practical routines for internalizing scales beyond rote repetition. - [Improvise with Scale Degrees](https://musicgenius.app/blog/posts/improvise-with-scale-degrees/): Using the function of each scale degree to construct melodies. ## Ear training & listening skills - [Ear Training for Beginners](https://musicgenius.app/blog/posts/ear-training-for-beginners/): Where to start, what to drill first, and how to know you are making progress. - [Why Ear Training Matters](https://musicgenius.app/blog/posts/why-ear-training-matters/): The musical skills ear training unlocks for songwriters, improvisers, and producers. - [Develop Relative Pitch](https://musicgenius.app/blog/posts/develop-relative-pitch/): A structured plan for going from zero to recognizing every interval by ear. - [Hear Chord Progressions](https://musicgenius.app/blog/posts/hear-chord-progressions/): How to identify common chord progressions in the songs you listen to. - [Identify Song Key by Ear](https://musicgenius.app/blog/posts/identify-song-key-by-ear/): A practical method that works without perfect pitch. - [Sight Singing Tips](https://musicgenius.app/blog/posts/sight-singing-tips/): Solfège-based techniques for singing notation at first sight. ## Instrument-specific - [Music Theory for Guitar](https://musicgenius.app/blog/posts/music-theory-for-guitar/): How standard theory maps onto the fretboard's CAGED/intervallic shapes. ## Practice habits - [Daily Music Theory Practice](https://musicgenius.app/blog/posts/daily-music-theory-practice/): A 10-minute daily routine combining theory study, ear training, and instrument practice. ## Optional - [Blog index](https://musicgenius.app/blog/): All long-form articles. - [Leaderboards](https://musicgenius.app/leaderboards): Global Time Trial rankings per game and preset. - [Pro upgrade](https://musicgenius.app/pro): Pricing and features for Pro membership.