Chorale Harmonization
Bach Chorales. Four Parts. Real-Time Validation.
The soprano is given — you write the alto, tenor, and bass. Voice ranges enforced. Part-writing rules checked as you compose. The most concentrated voice-leading practice available, built on Bach's four-part harmonizations.
Chorale Harmonization — write three voices against a given soprano
How It Works
Soprano Given, Three Voices to Write
The melody is provided from Bach’s harmonizations. You complete the alto, tenor, and bass to create a full four-part texture.
Voice Range Enforcement
Alto (G3–C5), Tenor (C3–G4), Bass (E2–D4). Notes outside the range are flagged immediately — learn to write idiomatically for each voice.
Part-Writing Rules Checked in Real Time
Parallel fifths, parallel octaves, voice crossing, spacing errors — all detected as you write, with specific explanations of each violation.
Graded Difficulty
Basic, Intermediate, and Advanced chorales. Start with simple diatonic progressions and build toward chromatic Bach harmonizations.
Four-part writing is the foundation of every compositional craft.
Master voice leading with Bach's chorales as your guide.