Bach Chorale Harmonizer
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How do I generate a chorale?
Go to the Generate tab, choose a key, and tap Generate. The app will create a complete four-part chorale in Bach style.
How do I harmonize my own melody?
Go to the Soprano tab and draw your melody on the piano roll. Tap Harmonize to generate the alto, tenor, and bass voices.
How do I switch between score and piano roll view?
In the Chorale tab, use the Score / Piano Roll toggle at the top of the panel.
Can I mute individual voices?
Yes — tap the S, A, T, or B buttons in the playback toolbar to mute or solo any voice.
How do I export to MIDI?
Tap the share button in the playback toolbar and choose MIDI.
Choral Lab does not collect any personal data. All processing happens on-device. No data is transmitted to external servers.