Diagram of the front panel of the Line 6 DL4 MkII Delay Modeler
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Line 6 DL4 MkII Delay Modeler MIDI CCs & NRPNs

MIDI implementation details for the Line 6 DL4 MkII Delay Modeler.

Last update: March 11, 2026 • 22 parameters

Contributions welcome! You can email us your edited CSV if you don't want to use GitHub.

Parameter control

Parameter CC Range Usage Description Orientation
Delay Model 1 [0–29]
0: Vintage Digital; 1: Crisscross; 2: Euclidean; 3: Dual Delay; 4: Pitch Echo; 5: ADT; 6: Ducked; 7: Harmony; 8: Heliosphere; 9: Transistor; 10: Cosmos; 11: Multi Pass; 12: Adriatic; 13: Elephant Man; 14: Glitch; 15: Digital; 16: Digital w/ Mod; 17: Echo Platter; 18: Stereo; 19: Ping Pong; 20: Reverse; 21: Dynamic; 22: Auto-Vol; 23: Tube Echo; 24: Tape Echo; 25: Multi-Head; 26: Sweep; 27: Analog; 28: Analog Mod; 29: Lo Res Delay
Note: Preset Mode
0-based
Reverb Model 2 [0–15]
0: Room; 1: Searchlights; 2: Particle Verb; 3: Double Tank; 4: Octo; 5: Tile; 6: Ducking; 7: Plateaux; 8: Cave; 9: Plate; 10: Ganymede; 11: Chamber; 12: Hot Springs; 13: Hail; 14: Glitz; 15: Reverb Off
Note: Preset Mode
0-based
Emulate Expression Pedal 3 [0–127]
0~127: Expression pedal amount
Must be initially set via EXP input
Note: Preset and Classic Looper modes
0-based
Preset Bypass 4 [0–127]
0-63: Bypass On; 64-127: Bypass Off
Note: Preset mode
0-based
Delay Time 11 [0–127]
0~127: Delay time
Note: Preset and Classic Looper modes
0-based
Time Subdivisions 12 [0–8]
0: 1/8 Triplet; 1: 1/8; 2: 1/8 Dotted; 3: 1/4 Triplet; 4: 1/4; 5: 1/4 Dotted; 6: 1/2 Triplet; 7: 1/2; 8: 1/2 Dotted
Note: Preset mode
0-based
Delay Repeats 13 [0–127]
0~127: Delay repeats
Note: Preset and Classic Looper modes
0-based
Delay Tweak 14 [0–127]
0~127: Delay tweak
Note: Preset and Classic Looper modes
0-based
Delay Tweez 15 [0–127]
0~127: Delay tweez
Note: Preset and Classic Looper modes
0-based
Mix 16 [0–127]
0~127: Mix
Note: Preset and Classic Looper modes
Centered
Reverb Decay 17 [0–127]
0~127: Reverb decay
Note: Preset mode
0-based
Reverb Predelay 18 [0–127]
0~127: Reverb predelay
Note: Preset mode
0-based
Reverb-Delay Routing 19 [0–2]
0: Reverb before delay; 1: Reverb and delay in parallel; 2: Reverb after delay
Note: Preset mode
0-based
Reverb Mix 20 [0–127]
0~127: Reverb mix
Note: Preset mode
Centered

Looper control

Parameter CC Range Usage Description Orientation
Classic Mode Looper On/Off 9 [0–127]
0-63: Off; 64-127: On
 — 0-based
Record/Overdub 60 [0–127]
0-63: Overdub; 64-127: Record
 — 0-based
Play/Stop 61 [0–127]
0-63: Stop; 64-127: Play
 — 0-based
Play Once 62 [0–127]
0-63: Noop; 64-127: Play Once
 — 0-based
Undo/Redo 63 [0–127]
0-63: Undo; 64-127: Redo
 — 0-based
Tap Tempo 64 [0–127]
0-63: Noop; 64-127: Tap Tempo
Note: Preset and Classic Looper modes
0-based
Forward/Reverse 65 [0–127]
0-63: Forward; 64-127: Reverse
 — 0-based
Half-Speed 66 [0–127]
0-63: Full Speed; 64-127: Half-Speed
 — 0-based

This dataset is provided under the Creative Commons Attribution Share Alike 4.0 International license.