Find the notes.
Feel the possibilities.
A home for curious musicians. Explore harmony, understand the theory, and turn independent lines into something worth hearing.
Different ways to find your sound.
The chord studio ↗
Build rich progressions, see every chord tone, and hear your next idea.
Gospel · jazz · neo-soul · pop02 / UNDERSTANDThe theory room ↗
Make sense of inversions, applied chords, cadences, and voice leading.
Lessons · class practice · explanations03 / COMPOSECounterpoint ↗
Write two independent lines. See the score and get feedback on each connection.
180 combinations · notation · playback04 / PRACTICEThe practice desk ↗
A new key, a new inversion, a new reason to keep your theory sharp.
828 generated spelling examplesPractice with a purpose.
The piano room ↗
Spell a chord note by note, or play a labeled keyboard.
POCKET THEORYScales in every key ↗
Major, minor, and modal scale practice with sharp and flat keys.
POCKET THEORYCadence training ↗
Hear authentic, half, plagal, and deceptive endings.
POCKET THEORYVoice & melody ↗
Echo a melody or write its pitch names.
POCKET THEORYThe jazz room ↗
Original horn and rhythm-section studies with transposed parts.
POCKET THEORYBuild your own test ↗
Choose topics and difficulty. See your score only when finished.
POCKET THEORYTeacher+ classroom ↗
Set time and attempt limits, enroll students, and track submitted scores.
POCKET THEORYYour assignments ↗
Join with a classroom code and see your assigned tests.