Choral Lab vs Counterpoint Dojo

Choral Lab brings the art of four-part Bach chorale writing to your iPhone. Whether you're a composer, music student, or theory enthusiast, explore one of the most refined harmonic styles in Western music. Harmonize your melodies. Draw a soprano line on the interactive piano roll and watch Choral Lab instantly generate alto, tenor, and bass voices following authentic Bach voice-leading rules — avoiding parallel fifths and octaves, resolving leading tones, and building natural cadences. Browse 410 Bach chorales. Explore the complete corpus of J.S. Bach's four-part chorales with full score display, real-time chord analysis, and playback with rich choir sounds. Two ways to read the music. Switch between a traditional four-part score view with proper notation and clefs, or a piano roll view to see the voice leading clearly laid out across time. Mute individual voices to focus on any single part or study how voices interact. Generate original chorales. Let the app create complete chorales from scratch in any key — major or minor — with realistic harmonic progressions, passing tones, and Picardy thirds. Study chord analysis. Follow along with real-time Roman numeral chord labels as the music plays. Features: • Interactive soprano piano roll with tie support • Automatic SATB harmonization in Bach style • Library of 410 J.S. Bach chorales • Score view with Bravura music engraving font • Piano roll view with per-voice muting • Real-time chord analysis • Choir, piano, and organ sounds • MIDI export • AUv3 plugin — works in GarageBand, AUM and other hosts • One-tap host tempo sync in plugin mode • MIDI output per voice (soprano, alto, tenor, bass on channels 1–4)

Counterpoint Dojo is a learning app for studying the relationship between independent melodic lines through explanations, playable scores, and writing exercises. FEATURES - Introductory lessons and the five species of Fux-style counterpoint - Additional lessons on melodic writing, suspensions, minor mode, three voices, free counterpoint, imitation, and canon - Play every teaching example and listen to the voices together - Write notes into guided exercises and check the specified conditions - Save completed attempts and replay them later - Review rule violations in the five-species exercises VERSION 1.1 - Added seven advanced lessons with newly created teaching examples - Added twelve guided writing exercises - Added attempt history for reviewing past work PLEASE NOTE The app interface and lesson text are currently in Japanese. Exercise evaluation checks the stated conditions and rules; it does not judge the artistic quality of a composition.