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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
The melody is provided from Bach’s harmonizations. You complete the alto, tenor, and bass to create a full four-part texture.
Alto (G3–C5), Tenor (C3–G4), Bass (E2–D4). Notes outside the range are flagged immediately — learn to write idiomatically for each voice.
Parallel fifths, parallel octaves, voice crossing, spacing errors — all detected as you write, with specific explanations of each violation.
Basic, Intermediate, and Advanced chorales. Start with simple diatonic progressions and build toward chromatic Bach harmonizations.
Master voice leading with Bach’s chorales as your guide.