JP-8080 Logic Pro Controller Plugin

An Audio Unit (AU) plugin for Logic Pro that provides a graphical interface to control the Roland JP-8080 hardware synthesizer via MIDI CC messages.

Technology Stack

• Recommended: JUCE Framework (C++ with excellent Audio Unit support)
• Alternative: Native Apple AUv3 (Swift/Objective-C++)

MIDI CC Mappings

Complete mappings extracted from the JP-8080 manual organized by section:

• Effects: Tone Control, Multi-FX Level, Delay (Time/Feedback/Level)
• LFO: LFO 1 & 2 Rate, Fade, Depth controls
• Oscillator: OSC 1 & 2 controls, Balance, X-Mod
• Filter: Cutoff, Resonance, Envelope (ADSR)
• Amplifier: Level, Envelope (ADSR)
• Control: Portamento, Sustain, Modulation, Expression, Pan
• Bank Select: User, Preset 1-3, Card banks with MSB/LSB values

Implementation Phases

1. Project Setup - JUCE/Xcode configuration
2. Parameter System - CC mappings, automation support
3. MIDI Output - CC messages, Bank/Program Change
4. User Interface - Panels mirroring JP-8080 layout
5. Advanced Features - MIDI Learn, presets
6. Testing & Polish

Key Technical Notes

• Plugin should default to MODE2 for maximum CC control
• JP-8080 requires Tx/Rx Edit Mode = MODE2 and Tx/Rx Edit SW = ON
• Supports Upper/Lower part channel selection

Documentation

See plan.md for the full implementation plan including:

• Complete MIDI CC mapping tables
• Detailed file structure
• GUI design mockup
• Technical considerations

Resources

• JUCE Framework
• Apple Audio Unit Documentation