pi-multifx-pedal-ui/docs/helix-parity-audit.md

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