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Changelog

All updates and release notes

v1.3.0 February 4, 2026

Production Release

New Features

  • Battery optimization guide: Quick access to Android battery settings from within the app

Improvements

  • Improved AndroidX compatibility
  • Updated documentation
v1.2.0 December 11, 2025

Favorite Chord Sets & Stability

New Features

  • Favorite chord sets: Save your favorite chord sets for quick access
  • Plugin error handling: Dedicated error screen when background plugin fails

Improvements

  • Fixed piano roll display (black keys now properly black)
  • Domain layer architecture improvements
v1.1.4 December 9, 2025

Two-way Pattern Sync & MIDI Stability

New Features

  • Two-way pattern sync: Pattern changes on your J-6 now reflect instantly in the app

Bug Fixes

  • Fixed MIDI message reception after reconnecting
  • Improved disconnect detection when device is unplugged
v1.1.3 December 8, 2025

Connection Diagnostics & Accessibility

New Features

  • Connection diagnostic wizard: 6-step troubleshooting guide when device isn't found
  • Error notifications: MIDI operation errors now shown via snackbar

Accessibility

  • Added screen reader support for remote control, pattern selection, and settings screens
  • All interactive elements now have proper accessibility labels

Improvements

  • Redesigned settings UI with new Interaction section
  • Added icons and badges to settings for better visual feedback
v1.1.2 December 8, 2025

Internal Quality Improvements

Improvements

  • Major code refactoring for better maintainability
  • Added 200+ unit tests for improved reliability
  • Reduced codebase size by 8,000+ lines
v1.1.1 December 6, 2025

Style Reference & Dark Mode

New Features

  • Style & Variation reference: View all 9 styles × 12 variations at a glance
  • Updated screenshots to dark theme

Bug Fixes

  • Fixed fallback locale from Japanese to English for better international support
v1.0.0 December 3, 2025

Initial Release

Features

  • Pattern selection: 64 patterns (8 banks × 8) with visual grid
  • BPM control: 40-300 BPM with slider and quick buttons
  • Transport control: Play/Stop with dedicated buttons
  • Chord set browser: Browse all 100 built-in chord sets with piano keyboard visualization
  • USB MIDI connection with auto-reconnect
  • Portrait and landscape support
  • English and Japanese localization