# Helix Stadium Feature Parity Audit — 2026-06-12

Based on manual Rev D v1.3 at https://manuals.line6.com/en/helix-stadium/live

## ✅ IMPLEMENTED & DEPLOYED

### Signal Path & Blocks
- Horizontal block chain with IN->OUT signal path
- SVG icons per block type (38 pipedal icons mapped)
- Block type labels & display names
- Bypass LED per block (green=active, dim=bypassed)
- Drag-to-reorder blocks
- Parameter panel with sliders & knobs (toggleable)
- Focus View (full-screen block editor) — in codebase
- Split/Merge blocks with 4 split types
- Parallel signal paths with dual-row layout
- IN/OUT terminators

### Presets
- Preset sidebar (Bank + 4 programs)
- Preset loading via POST /api/presets/{bank}/{program}/activate
- Bank navigation
- Current preset indicator

### Footswitch Modes
- Stomp mode — block toggle footswitches
- Preset mode — bank up/down + preset selection
- Scribble strips per footswitch
- Global bypass
- Mode selector (SM/PR toggle in status bar)
- Double-tap gesture support

### Tuner
- Visual tuner with mute
- Status bar toggle

### Status Bar
- Connection indicator, CPU, sample rate
- Master volume, routing mode, preset name
- Tuner badge, mode selector
- Captures/Presets view buttons
- Fullscreen toggle

### UI Design
- Dark theme, Helix-inspired layout
- Large touch targets, landscape
- Custom SVG icons
- Fullscreen mode

## ⚠️ PARTIALLY IMPLEMENTED

### Snapshots
- SnapshotPanel reference extracted (docs/snapshot-reference.jsx)
- Snapshot mode in TS reference project
- NOT wired into main JSX UI
- No snapshot footswitch mode in FootswitchBar
- No snapshot bypass toggle or per-parameter control

### Model Browser
- Currently being built by coder (running)

## ❌ NOT IMPLEMENTED

### P3: Undo/Redo + Menu + Global Settings (todo)
- Undo/Redo for block operations
- Main menu (New Preset, Save, Command Center, etc.)
- Global Settings UI
- Global EQ
- Save preset

### P3: Looper (todo)
- Record/Play/Overdub/Stop

### Block Action Panel
- Copy/Paste/Clear blocks
- User/Factory Defaults
- Snapshot Bypass toggle
- Assign to footswitch

### Command Center (MIDI)
- MIDI CC/Note/Program
- Ext amp switching, Hotkeys
- Instant commands, Dual-command

### Song View
- Setlist management
- Per-song presets

### Other
- Drag off-screen delete
- Block copy/paste cross-preset
- Parameter page swipe (8+ params)
- Favorites, User Defaults
- Tempo control
- Preset save with naming
- Discard Edits toggle
- MIDI recall info