Choral Lab
Chorale Harmonizer
About
Compose and study Bach-style four-part chorales. Harmonize melodies with automatic voice generation, explore a library of 410 Bach chorales, and analyze chords in real-time. Offers both score and piano roll views for detailed study.
What's New in Choral Lab
2.0
September 17, 2026
• AUv3 plugin — use Choral Lab inside GarageBand, AUM, and other compatible hosts • Live piano-roll preview with real-time playhead in plugin mode • One-tap host tempo sync • MIDI output: each voice on its own channel for recording • Three sounds: choir, strings, piano • General stability improvements
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FAQ
What is Choral Lab?
Choral Lab is an application designed for composing and studying four-part Bach chorales. It offers features like automatic harmonization, a library of Bach's chorales, and real-time chord analysis.
How does Choral Lab harmonize melodies?
You can draw a soprano line on the interactive piano roll, and Choral Lab will automatically generate alto, tenor, and bass voices following Bach's voice-leading rules, avoiding parallel fifths and octaves.
Does Choral Lab have ads?
No, Choral Lab does not contain advertisements. It is a paid application with no ads.
What devices does Choral Lab support?
Choral Lab is available for iPhone and iPad devices.
How many Bach chorales are included in Choral Lab?
The app features a library of 410 complete four-part chorales by J.S. Bach, allowing users to explore and study them.
Can I export my compositions from Choral Lab?
Yes, Choral Lab supports MIDI export, allowing you to export your generated chorales for use in other music software.
What is the age rating for Choral Lab?
Choral Lab has an age rating of 4+, making it suitable for a wide range of users interested in music.
How often is Choral Lab updated?
The latest version of Choral Lab is 1.1, which was last updated on August 3, 2026. Updates typically address bug fixes and feature enhancements.
