Master Music Theory
One Note at a Time
Interactive flashcards and timed challenges to sharpen your music reading skills. Perfect for students, teachers, and musicians.
Note Reading
Master sight-reading on all four clefs
Treble Clef
Read notes on the treble staff. Essential for piano, violin, flute, and guitar.
Bass Clef
Conquer the bass staff. Perfect for bass, cello, trombone, and left-hand piano.
Alto Clef
The viola player's essential. C clef centered on the middle line.
Tenor Clef
Navigate upper registers of cello, trombone, and bassoon.
Keys & Scales
Understand tonality, modes, and scale construction
Key Signatures
Learn all major and minor key signatures on all clefs.
Musical Modes
Learn the seven modes: Ionian, Dorian, Phrygian, Lydian, and more.
Mode Calculator
Calculate any mode instantly. See all 7 relative modes that share a key signature.
Scale Syllabus
Chord-scale reference by chord quality. Essential for improvisation!
Scale Degrees
Master chord extensions and alterations. Identify b9, #11, 13th from any root.
Solfege
Learn moveable-do solfege with chromatic alterations in any key.
Intervals
Calculate melodic distances with proper enharmonic spelling
Ear Training
Train your ears to recognize intervals and chords by sound
Ascending Intervals
Identify all 13 intervals by ear when notes ascend from low to high.
Descending Intervals
Identify all 13 intervals by ear when notes descend from high to low.
Harmonic Intervals
Identify intervals by their simultaneous "color" when both notes play together.
Triad Quality
Identify major, minor, diminished, and augmented triads by sound alone.
Seventh Chords
Identify Maj7, Dom7, Min7, Half-Dim, and Dim7 chords by ear.
Jazz Harmony
Dominant chords, substitutions, and progressions
Secondary Dominants
Master V7/ii, V7/V, V7/vi and more in all keys.
Associated V7 Chords
Practice chord extensions of V7 chords relative to their tonic keys.
Tritone Substitutions
Master tritone subs for dominant 7th chords. Essential jazz reharmonization!
ii-V-I Progressions
The most important chord progression in jazz. Practice in all keys.
Chord Progression Generator
Generate random progressions for practice and improvisation. Customize qualities and length.
Set Theory & 12-Tone
Post-tonal analysis and serial composition tools
12-Tone Matrix
Generate and analyze twelve-tone matrices. View P, R, I, and RI forms.
Interval Vector
Calculate interval class vectors for any pitch-class set.
Melodic Inversion
Calculate melodic inversions around any axis. Supports note names and integers.
All-Combinatorial Hexachords
Explore the six all-combinatorial hexachords and their properties.
Transposition
Master instrument transpositions and concert pitch
Reference Tools
Practical tools for working musicians
Best Music Theory Books
In-depth reviews of the best textbooks for all levels, from beginner to graduate.
Circle of Fifths & Fourths
Interactive diagram showing key relationships, signatures, and chord progressions.
Order of Sharps & Flats
Learn FCGDAEB and BEADGCF with mnemonics and key signature tricks.
Major Scales Guide
Interactive keyboard showing all 12 major scales with the W-W-H-W-W-W-H pattern.
Clef Mnemonics
FACE, Every Good Boy Does Fine, and mnemonics for all clefs.
Interval Reference Songs
Learn to identify intervals using familiar songs with audio playback.
60-Second Challenges
Test your speed with timed rounds. Compete on leaderboards and track improvement.
Smart Tracking
See common mistakes at a glance. Focus practice where it matters most.
Practice Anywhere
Works on any device with dark mode. No downloads, no accounts required.