Pattern Sequencer
=================

The **Pattern Sequencer** provides comprehensive control over the JD-Xi's pattern creation and sequencing capabilities, offering advanced pattern creation and multi-part sequencing. This powerful editor transforms your JD-Xi's pattern sequencer into a professional-grade sequencing workstation.

Built with advanced Qt6 technology and featuring real-time parameter control, the Pattern Sequencer serves as your primary workspace for creating, editing, and managing complex patterns and sequences with the precision and control of modern software synthesizers.

What is the Pattern Sequencer?
==============================

The Pattern Sequencer is a specialized interface that provides deep, granular control over the JD-Xi's pattern creation and sequencing capabilities. Unlike the limited hardware interface, this editor offers expansive, visual control over every parameter with real-time feedback, advanced organization tools, and professional-grade editing capabilities.

The editor represents a dedicated workspace optimized for pattern creation and sequencing, from basic step sequences to complex multi-part patterns. The editor automatically synchronizes with your JD-Xi hardware, ensuring that every change is instantly reflected in your synthesizer's sound.

Core Architecture & Design
===========================

** Multi-Part Sequencing**
   The Pattern Sequencer features a sophisticated multi-part sequencing system:
   - **4-Part Control**: Independent pattern creation for each synthesizer part
   - **Step-by-Step Editing**: Precise control over timing, velocity, and note placement
   - **Real-time Recording**: Live pattern creation and editing
   - **Pattern Management**: Organization, storage, and recall of your sequences

** Advanced Parameter Management**
   - **Comprehensive Parameter Mapping**: Every sequencer parameter is accessible through intuitive controls
   - **Real-time Updates**: Instant parameter changes with immediate hardware response
   - **Visual Feedback**: Live parameter displays, value indicators, and status monitoring
   - **Preset Integration**: Seamless loading, saving, and management of your custom patterns

** Professional Workflow Tools**
   - **Multi-Pattern Support**: Work with multiple patterns simultaneously
   - **Advanced Organization**: Categorize, search, and manage your pattern library
   - **Project Integration**: Export and import patterns for use in your DAW
   - **Performance Optimization**: Low-latency response for live performance and recording

Pattern Sequencer Features
==========================

**Multi-Part Sequencing**
   Independent pattern creation for each synthesizer part:

   **Part Management**
      - **Part Selection**: Choose which part to sequence
      - **Part Patterns**: Individual patterns per part
      - **Part Synchronization**: Synchronize patterns between parts
      - **Part Mixing**: Mix patterns from different parts

   **Part Control**
      - **Part Mute/Solo**: Mute or solo individual parts
      - **Part Volume**: Control volume per part
      - **Part Pan**: Control panning per part
      - **Part Effects**: Apply effects per part

**Step-by-Step Editing**
   Precise control over timing, velocity, and note placement:

   **Step Grid**
      - **Grid Display**: Visual representation of step grid
      - **Grid Resolution**: Adjustable grid resolution
      - **Grid Snap**: Snap to grid for precise timing
      - **Grid Zoom**: Zoom in/out for detailed editing

   **Step Editing Tools**
      - **Step Selection**: Select individual or multiple steps
      - **Step Copy/Paste**: Copy and paste step data
      - **Step Clear**: Clear step data
      - **Step Fill**: Fill steps with patterns

**Real-time Recording**
   Live pattern creation and editing:

   **Recording Modes**
      - **Real-time Recording**: Record patterns in real-time
      - **Step Recording**: Record patterns step by step
      - **Overdub Recording**: Add to existing patterns
      - **Replace Recording**: Replace existing patterns

   **Recording Control**
      - **Record Start/Stop**: Control recording start and stop
      - **Record Quantization**: Quantize recorded notes
      - **Record Velocity**: Record velocity information
      - **Record Timing**: Record timing information

Advanced Pattern Features
=========================

**Pattern Variation**
   Advanced pattern variation and development tools:

   **Variation Types**
      - **Rhythmic Variations**: Vary rhythm and timing
      - **Melodic Variations**: Vary note order and selection
      - **Harmonic Variations**: Vary chord and harmony
      - **Dynamic Variations**: Vary velocity and expression

   **Variation Control**
      - **Variation Amount**: Control amount of variation
      - **Variation Types**: Choose types of variation
      - **Variation Timing**: Control when variations occur
      - **Variation Learning**: Learn from user preferences

**Pattern Morphing**
   Morph between different patterns:

   **Morphing Types**
      - **Linear Morphing**: Linear interpolation between patterns
      - **Non-linear Morphing**: Non-linear interpolation
      - **Selective Morphing**: Morph specific parameters
      - **Custom Morphing**: User-defined morphing

   **Morphing Control**
      - **Morph Amount**: Control amount of morphing
      - **Morph Speed**: Control speed of morphing
      - **Morph Direction**: Control direction of morphing
      - **Morph Automation**: Automate morphing parameters

**Pattern Blending**
   Blend multiple patterns together:

   **Blending Types**
      - **Additive Blending**: Add patterns together
      - **Multiplicative Blending**: Multiply patterns
      - **Selective Blending**: Blend specific parameters
      - **Custom Blending**: User-defined blending

   **Blending Control**
      - **Blend Amount**: Control amount of blending
      - **Blend Balance**: Control balance between patterns
      - **Blend Automation**: Automate blending parameters
      - **Blend Presets**: Save and recall blending settings

Performance Features
====================

**Live Performance**
   Real-time pattern switching and manipulation:

   **Performance Controls**
      - **Pattern Switching**: Switch between patterns in real-time
      - **Pattern Mixing**: Mix multiple patterns simultaneously
      - **Pattern Automation**: Automate pattern changes
      - **Pattern Synchronization**: Synchronize patterns with external clock

   **Performance Modes**
      - **Live Mode**: Optimized for real-time performance
      - **Edit Mode**: Detailed parameter editing
      - **Preset Mode**: Quick preset switching
      - **Learn Mode**: MIDI controller learning

**Pattern Automation**
   Advanced pattern automation capabilities:

   **Automation Types**
      - **Pattern Automation**: Automate pattern changes
      - **Parameter Automation**: Automate pattern parameters
      - **Timing Automation**: Automate timing changes
      - **Velocity Automation**: Automate velocity changes

   **Automation Control**
      - **Automation Recording**: Record automation data
      - **Automation Playback**: Play back recorded automation
      - **Automation Editing**: Edit recorded automation
      - **Automation Management**: Organize and manage automation

**Musical Integration**
   Seamless integration with your musical compositions:

   **DAW Integration**
      - **MIDI Export**: Export patterns as MIDI files
      - **Audio Export**: Export patterns as audio files
      - **Project Integration**: Integrate with DAW projects
      - **Synchronization**: Sync with DAW tempo and timing

   **Live Performance**
      - **Live Switching**: Switch patterns during performance
      - **Live Editing**: Edit patterns during performance
      - **Live Recording**: Record new patterns during performance
      - **Live Synchronization**: Sync with external clock

Creative Tools
==============

**Advanced Tools**
   Advanced tools for musical expression and creativity:

   **Expression Control**
      - **Velocity Curves**: Custom velocity response
      - **Timing Curves**: Custom timing response
      - **Expression Mapping**: Map expression to parameters
      - **Expression Automation**: Automate expression parameters

   **Creative Features**
      - **Pattern Randomization**: Randomize pattern elements
      - **Pattern Learning**: Learn from user input
      - **Pattern Evolution**: Evolve patterns over time
      - **Pattern Templates**: Use pattern templates

**Pattern Templates**
   Pre-built pattern templates for quick start:

   **Template Types**
      - **Drum Patterns**: Pre-built drum patterns
      - **Bass Patterns**: Pre-built bass patterns
      - **Melodic Patterns**: Pre-built melodic patterns
      - **Harmonic Patterns**: Pre-built harmonic patterns

   **Template Control**
      - **Template Selection**: Choose from available templates
      - **Template Customization**: Customize template parameters
      - **Template Saving**: Save custom templates
      - **Template Sharing**: Share templates with others

Visual Feedback & Monitoring
============================

**Real-time Visualization**
   Live display of patterns and parameter relationships:

   **Pattern Display**
      - **Step Grid**: Visual representation of step grid
      - **Note Display**: Visual representation of notes
      - **Velocity Display**: Visual representation of velocity
      - **Timing Display**: Visual representation of timing

   **Parameter Display**
      - **Parameter Meters**: Real-time parameter level display
      - **Parameter Graphs**: Visual representation of parameters
      - **Parameter Comparison**: Compare different parameter settings
      - **Parameter Automation**: Visual automation display

**Parameter Monitoring**
   Comprehensive display of current settings and parameter relationships:

   **Value Displays**
      - **Numerical Values**: Precise parameter values
      - **Bar Graphs**: Visual parameter levels
      - **Meters**: Real-time level monitoring
      - **Status Indicators**: Parameter state indicators

   **Relationship Display**
      - **Pattern Chain**: Visual pattern routing
      - **Parameter Dependencies**: Show parameter relationships
      - **Modulation Matrix**: Visual modulation routing
      - **Signal Flow**: Audio signal path display

Getting Started with Pattern Sequencer
======================================

**Initial Setup**
   1. **Launch Pattern Sequencer**: Open the Pattern Sequencer from the main interface
   2. **Load a Pattern**: Start with a factory pattern to understand the interface
   3. **Explore Controls**: Familiarize yourself with the available parameters and controls
   4. **Test Your Changes**: Play patterns using the virtual keyboard or MIDI controller

**Basic Workflow**
   1. **Choose a Part**: Select which synthesizer part to sequence
   2. **Create a Pattern**: Use step editing or real-time recording
   3. **Edit Steps**: Modify individual steps in the pattern
   4. **Save Your Work**: Use the pattern management system to save your creations

**Advanced Techniques**
   - **Multi-Part Sequencing**: Create patterns for multiple synthesizer parts
   - **Pattern Variation**: Create variations of existing patterns
   - **Pattern Morphing**: Morph between different patterns
   - **Performance Integration**: Optimize the interface for live performance

**Tips for Effective Pattern Creation**
   - **Start Simple**: Begin with basic patterns and simple parameters
   - **Use Templates**: Use pattern templates for quick start
   - **Experiment with Variation**: Create variations of existing patterns
   - **Save Frequently**: Save your work regularly to avoid losing changes

The Pattern Sequencer transforms your Roland JD-Xi's sequencing capabilities into a professional-grade sequencing workstation, providing the tools and interface you need to create, edit, and manage sophisticated patterns and sequences with the precision and control of modern software synthesizers.

.. figure:: images/jdxi-pattern-sequencer.png
   :alt: Pattern Sequencer - Multi-Part Sequencing
   :width: 60%

   Pattern Sequencer - Multi-Part Sequencing