| name | mmd-device-hx-effects |
| description | Guide for using the Line 6 HX Effects device library in MMD files. Use when the user mentions HX Effects, HX Effects processor, effects-only processor, or needs help with 4-snapshot control, sequential preset addressing (banks), 5-pin DIN MIDI, or amp integration workflows. |
Line 6 HX Effects Usage Guide
Expert guidance for using the HX Effects device library in MIDI Markdown files.
When to Use This Skill
Invoke this skill when working with:
- Line 6 HX Effects (effects-only processor)
- 4-snapshot control
- Sequential preset addressing (32 banks × 4 presets)
- 5-pin DIN MIDI connectivity (advantage over HX Stomp/XL)
- Amp integration workflows
- 6 footswitch control
- Effects-only applications (no amp/cab modeling)
Quick Start
Import the Library
@import "devices/hx_effects.mmd"
Basic Preset Loading
[00:00.000]
# Load Bank 1 Preset A (PC = 0)
- hxfx_preset 1 0
# Load Bank 5 Preset C (PC = 18)
# Formula: ((5-1) × 4) + 2 = 18
- hxfx_preset 1 18
# Load preset and switch to snapshot
- hxfx_load_snapshot 1 18 2 # Preset 18, Snapshot 3
Snapshot Control (4 Snapshots)
[00:00.000]
# Named snapshots (1-4)
- hxfx_snap_1 1
- hxfx_snap_2 1
- hxfx_snap_3 1
- hxfx_snap_4 1
# Parameterized (0-3)
- hxfx_snapshot 1 3 # Snapshot 4
Key Differences from Other Helix Models
HX Effects Unique Features
✅ Effects-Only Processor:
- No amp/cab modeling
- Focus on effects processing
- Integration with external amps
✅ 5-Pin DIN MIDI:
- Full MIDI In/Out/Thru
- Hardware daisy-chaining
- Lower jitter than USB
- Optical isolation
- Advantage over HX Stomp/XL (USB only)
✅ Sequential Preset Addressing:
- 32 Banks × 4 Presets (A-D)
- 128 presets total
- Intuitive bank organization
- No Bank Select needed
⚠️ 4 Snapshots:
- Better than HX Stomp (3)
- Less than full Helix (8)
- Good balance for most songs
✅ 6 Footswitches:
- FS1-6 available
- More than HX Stomp (5)
- Less than Helix Floor (11)
Understanding Sequential Preset Addressing
Addressing Formula
Formula: PC = ((Bank - 1) × 4) + Preset_Offset
Where Preset_Offset:
Quick Reference Table
Bank 1: PC 0-3 (Presets A-D)
Bank 2: PC 4-7 (Presets A-D)
Bank 3: PC 8-11 (Presets A-D)
Bank 4: PC 12-15 (Presets A-D)
Bank 5: PC 16-19 (Presets A-D)
Bank 10: PC 36-39 (Presets A-D)
Bank 32: PC 124-127 (Presets A-D)
Calculation Examples
Bank 5 Preset C:
((5-1) × 4) + 2 = 16 + 2 = 18
Bank 10 Preset A:
((10-1) × 4) + 0 = 36 + 0 = 36
Bank 32 Preset D:
((32-1) × 4) + 3 = 124 + 3 = 127
Preset Management
Direct Preset Loading
[00:00.000]
# Load Bank 1 Preset A
- hxfx_preset 1 0
# Load Bank 1 Preset B
- hxfx_preset 1 1
# Load Bank 5 Preset C (calculate: ((5-1)×4)+2 = 18)
- hxfx_preset 1 18
# Load Bank 32 Preset D (last preset)
- hxfx_preset 1 127
Named Bank 1 Shortcuts
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# Commonly used first bank
- hxfx_bank1_a 1 # PC 0
- hxfx_bank1_b 1 # PC 1
- hxfx_bank1_c 1 # PC 2
- hxfx_bank1_d 1 # PC 3
Load with Snapshot
[00:00.000]
# Load Bank 3 Preset B with Snapshot 3
# Bank 3 Preset B = ((3-1)×4)+1 = 9
- hxfx_load_snapshot 1 9 2 # PC 9, Snapshot 3
Snapshot Control
4 Snapshots Available
HX Effects has 4 snapshots (0-3), providing good flexibility.
Better than: HX Stomp (3 snapshots)
Less than: Full Helix (8 snapshots)
Same as: HX Stomp XL (4 snapshots)
[00:00.000]
# Named snapshots
- hxfx_snap_1 1 # Snapshot 1
- hxfx_snap_2 1 # Snapshot 2
- hxfx_snap_3 1 # Snapshot 3
- hxfx_snap_4 1 # Snapshot 4
# Parameterized
- hxfx_snapshot 1 2 # Snapshot 3
4-Snapshot Song Arrangements
Pattern 1: Verse/Chorus/Bridge/Solo
[00:00.000]
# Load song preset
- hxfx_preset 1 8 # Bank 3 Preset A
# Verse
- hxfx_snap_1 1
# Chorus
[00:16.000]
- hxfx_snap_2 1
# Bridge
[00:32.000]
- hxfx_snap_3 1
# Solo
[00:48.000]
- hxfx_snap_4 1
Pattern 2: Dry → Subtle → Wet → Ambient
[00:00.000]
- hxfx_preset 1 12 # Bank 4 Preset A
# Dry (minimal FX)
- hxfx_snap_1 1
# Subtle (light delay/reverb)
[00:08.000]
- hxfx_snap_2 1
# Wet (moderate FX)
[00:16.000]
- hxfx_snap_3 1
# Ambient (heavy FX)
[00:24.000]
- hxfx_snap_4 1
Amp Integration
HX Effects Excels at Amp Control
HX Effects is designed for integration with external amps via MIDI.
Preset with Amp Channel Change
[00:00.000]
# Load HX Effects preset and switch amp channel
- hxfx_preset_with_amp 1 12 2
# Params: ch, preset, amp_channel
# This expands to:
# - Load HX Effects preset
# - Wait 350ms
# - Send PC to external amp (channel 2 by default)
Snapshot with Amp Channel
[00:00.000]
# Change snapshot and amp channel simultaneously
- hxfx_snapshot_with_amp 1 2 3
# Params: ch, snapshot, amp_channel
Snapshot with External Pedal
[00:00.000]
# Change snapshot and control external pedal
- hxfx_snapshot_with_pedal 1 2 71 127
# Params: ch, snapshot, pedal_cc, pedal_state
5-Pin DIN MIDI Advantages
Why 5-Pin DIN is Better
HX Effects has full 5-pin DIN MIDI (unlike HX Stomp/XL).
Advantages:
- ✅ Hardware MIDI Thru for daisy-chaining
- ✅ Lower jitter for MIDI Clock (vs USB)
- ✅ Optical isolation (no ground loops)
- ✅ Standard controller compatibility
- ✅ No computer/USB host required
Typical MIDI Chain
MIDI Controller → HX Effects → External Amp → External Pedals
(5-pin) THRU THRU END
Configuration: Global Settings > MIDI/Tempo > MIDI Thru
Footswitch Control
6 Footswitches Available
HX Effects has 6 footswitches (FS1-6).
[00:00.000]
# Toggle footswitches (ALWAYS toggle)
- line6_fs1 1
- line6_fs2 1
- line6_fs3 1
- line6_fs4 1
- line6_fs5 1
- line6_fs6 1
Important: Like all Helix family, footswitches ALWAYS toggle. Cannot force on/off via MIDI.
Expression Pedal Control
2 Expression Pedals
HX Effects has 2 expression pedals (EXP1, EXP2).
[00:00.000]
# Direct MIDI values
- line6_exp1 1 64
- line6_exp2 1 100
# With modulation
- line6_exp_swell 1 1 0 127 # Smooth swell
- line6_exp_vibrato 1 1 64 3.0 20 # Vibrato
- line6_exp_envelope 1 1 # ADSR envelope
- line6_exp_ar 1 1 0.5 1.0 # AR envelope
Looper Control
[00:00.000]
# Full looper workflow
- line6_looper_start_recording 1
[+8s]
- line6_looper_playback 1
[+16s]
- line6_looper_stop_exit 1
All standard Helix looper functions available (from common library).
Command Center for Amp Integration
Full Command Center Available
HX Effects has full Command Center (no CV/Ext Amp - effects only).
Use cases:
- Switch amp channels
- Control external pedals
- Sync external effects
- MIDI clock distribution
Complete Amp Integration Example
[00:00.000]
# Song Section 1: Clean with ambient FX
- hxfx_preset 1 0 # Bank 1 Preset A
- hxfx_snap_1 1 # Clean snapshot
# Send amp to clean channel (example: Mesa Boogie on channel 2)
- pc 2.0 # Amp clean channel
# Song Section 2: Crunch with delay
[00:16.000]
- hxfx_snap_2 1 # Delay snapshot
- pc 2.1 # Amp crunch channel
# Song Section 3: High gain with reverb
[00:32.000]
- hxfx_snap_3 1 # Reverb snapshot
- pc 2.2 # Amp lead channel
# Song Section 4: Solo with boost
[00:48.000]
- hxfx_snap_4 1 # Solo snapshot
- cc 2.71.127 # Engage external boost pedal
4-Snapshot Workflow Patterns
Song Section Mapping
[00:00.000]
# Preset for Song 1
- hxfx_preset 1 8 # Bank 3 Preset A
# Snapshot 1: Verse FX
- hxfx_snap_1 1
# Snapshot 2: Chorus FX
[00:16.000]
- hxfx_snap_2 1
# Snapshot 3: Bridge FX
[00:32.000]
- hxfx_snap_3 1
# Snapshot 4: Solo FX
[00:48.000]
- hxfx_snap_4 1
Wetness Progression
[00:00.000]
- hxfx_wetness_progression 1 12
# This demonstrates progressive wetness:
# Snapshot 1: Dry (minimal FX)
# Snapshot 2: Subtle (light delay/reverb)
# Snapshot 3: Wet (moderate FX mix)
# Snapshot 4: Ambient (heavy delay/reverb/mod)
Firmware Timing Requirements
Same as Other Helix Models
Firmware 3.5x: 350ms delay after PC
Firmware 3.10+: CC69 buffered, can reduce to 50ms
Firmware 3.80: Stable
See Helix skill for detailed timing guidance.
[00:00.000]
# ✅ CORRECT - Helper includes delay
- hxfx_load_snapshot 1 12 2
# ❌ WRONG - Manual without delay (firmware 3.5x)
- pc 1.12
- cc 1.69.2 # Might be ignored!
Usage Examples
Example 1: Load Specific Bank/Preset
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# Bank 5 Preset C
# Calculate: ((5-1)×4)+2 = 18
- hxfx_preset 1 18
Example 2: Song with Snapshots
[00:00.000]
# Bank 3 Preset A
- hxfx_preset 1 8
# Verse
- hxfx_snap_1 1
# Chorus
[00:16.000]
- hxfx_snap_2 1
# Bridge
[00:32.000]
- hxfx_snap_3 1
# Solo
[00:48.000]
- hxfx_snap_4 1
Example 3: Expression Automation
[00:00.000]
# Smooth expression swell
- line6_exp_swell 1 1 0 127
[00:04.000]
# Vibrato effect
- line6_exp_vibrato 1 1 64 3.0 25
Example 4: Amp Integration
[00:00.000]
# Load preset and switch amp channel
- hxfx_preset_with_amp 1 12 2
# Snapshot with amp change
[00:16.000]
- hxfx_snapshot_with_amp 1 2 3
Common Mistakes and Fixes
Mistake 1: Wrong PC Calculation
# ❌ WRONG - Forgot to subtract 1 from bank
# Bank 5 Preset C (incorrect: 5×4+2 = 22)
- hxfx_preset 1 22 # WRONG!
# ✅ CORRECT - Use formula: ((Bank-1)×4)+Offset
# Bank 5 Preset C = ((5-1)×4)+2 = 18
- hxfx_preset 1 18
Mistake 2: Missing Delay After PC
# ❌ WRONG (firmware 3.5x)
[00:00.000]
- pc 1.12
- cc 1.69.2 # Ignored!
# ✅ CORRECT - Use helper
[00:00.000]
- hxfx_load_snapshot 1 12 2
Mistake 3: Expecting More Than 4 Snapshots
# ❌ WRONG - HX Effects only has snapshots 0-3
- hxfx_snapshot 1 4 # ERROR!
# ✅ CORRECT - Use preset changes for more sections
- hxfx_preset 1 16 # Load different preset
Comparison: HX Effects vs Others
HX Effects (You Are Here)
- ⚠️ 4 snapshots (good balance)
- ⚠️ 6 footswitches
- ⚠️ 2 expression pedals
- ✅ 5-pin DIN MIDI (Thru enabled)
- ✅ Effects-only (amp integration focus)
- ✅ Sequential addressing (bank-based)
- ✅ Full Command Center
Best for:
- Effects processing with external amps
- MIDI hardware integration
- 5-pin DIN MIDI ecosystem
- Users who don't need amp/cab modeling
HX Stomp/XL
- ❌ USB MIDI only (no 5-pin DIN)
- ✅ Amp/cab modeling included
- ⚠️ 3-4 snapshots (limited)
Full Helix
- ✅ 8 snapshots (maximum flexibility)
- ✅ 11 footswitches (Floor/LT)
- ✅ 5-pin DIN MIDI
- ✅ Amp/cab modeling
- ❌ Larger footprint
- ❌ More expensive
Troubleshooting
| Issue | Solution |
|---|
| Wrong preset loads | Double-check PC calculation: ((Bank-1)×4)+Offset |
| Snapshots don't switch | Add 350ms delay after PC (firmware 3.5x) |
| MIDI Thru doesn't work | Enable in Global Settings > MIDI/Tempo > MIDI Thru |
| Amp won't switch channels | Check amp's MIDI channel, ensure 5-pin cable connected |
| Footswitches don't work | HX Effects footswitches toggle only, can't force on/off |
Reference
Device Library Location
- Main:
devices/hx_effects.mmd
- Common:
devices/line6_common.mmd (imported automatically)
Documentation
Official Manual: https://line6.com/support/manuals/hxeffects
Firmware Version
3.80 (current as of library version)
See Also
