Companion for J-6

Companion for J-6 is an unofficial companion app for controlling the Roland AIRA Compact J-6 Chord Synthesizer via USB connection.

【Features】
▸ Pattern Selection
Switch between 64 patterns (8 banks × 8) with one tap. In landscape mode, view all 8 banks at once for quick navigation.

▸ BPM Control
Adjust 40-300 BPM with a smooth slider. Fine-tune with ±1, ±5, ±10 quick buttons. Syncs with J-6's MIDI clock in real-time.

▸ Transport Control
Play/Stop with dedicated buttons. Hold function (CC#64) for sustained chords.

▸ Two-way Sync
Pattern changes on your J-6 reflect instantly in the app. Always know which pattern is playing.

▸ Chord Set Browser
Browse all 100 built-in chord sets. Filter by genre — Pop, Jazz, R&B, and more. See chord voicings on a piano keyboard so you know exactly what notes you're playing.

▸ Style & Variation Reference
View all 9 styles × 12 variations at a glance. Each rhythm pattern is isualized, helping you find the perfect phrase without trial and error.

【Why Choose This App】
✓ Simple Design - No complex setup, just connect and use
✓ Stable Operation - Auto-reconnect and background sync
✓ Portrait & Landscape - Use it however you like
✓ Completely Free - No ads, no in-app purchases
✓ English/Japanese support

【How to Use】
1. Connect your J-6 to your smartphone with a USB-C cable
2. Set J-6 SYNC to "USB" (MENU → SYNC)
3. Select the device in the app and you're ready

【Requirements】
• Android device with USB Host support
• Android 7.0 or later

【Disclaimer】
• This is an unofficial app not affiliated with Roland Corporation
• Roland, AIRA, and J-6 are trademarks of Roland Corporation

【Contact】
For bug reports or feature requests: fufabu.dev@gmail.com