Eventide H90 Harmonizer — MIDI Editor & CC Reference

Control the Eventide H90 Harmonizer from your browser — full MIDI CC reference for 14 parameters, interactive editor, and AI-generated presets. Free, no install.

Nitelite gives the H90 Harmonizer a full browser-based control surface: turn every knob, flip every switch, describe the tone you want to the AI Tone Terminal, and save the results — all sent to the pedal live over MIDI (default channel 1). Works free in Chrome, Edge, Opera, or Brave — no install required.

Knobs

Control	MIDI CC	Description
P MIX	CC 22	Program-level wet/dry mix — blends between dry signal and the combined output of both Presets A and B
IN GAIN	CC 23	Program input gain — adjusts the signal level entering the H90 processing. Center (64) = unity gain
OUT GAIN	CC 24	Program output gain — adjusts the processed signal level. Center (64) = unity gain
QUICK 1	CC 25	Quick Knob 1 — assignable per Program to any Preset A, Preset B, or Program-level parameter
QUICK 2	CC 26	Quick Knob 2 — assignable per Program to any Preset A, Preset B, or Program-level parameter
QUICK 3	CC 27	Quick Knob 3 — assignable per Program to any Preset A, Preset B, or Program-level parameter
HOTKNOB P	CC 28	Program HotKnob — macro controller that simultaneously adjusts multiple mapped parameters across both Presets. Controlled by the Perform encoder
HOTKNOB A	CC 29	Preset A HotKnob — macro controller for Preset A parameters
HOTKNOB B	CC 30	Preset B HotKnob — macro controller for Preset B parameters
A IN GAIN	CC 31	Preset A input gain — adjusts signal level entering Preset A algorithm
A OUT GAIN	CC 33	Preset A output gain — adjusts Preset A processed signal level
B IN GAIN	CC 34	Preset B input gain — adjusts signal level entering Preset B algorithm
B OUT GAIN	CC 35	Preset B output gain — adjusts Preset B processed signal level

Switches

Switch	MIDI CC	Positions
EFFECT TYPE	CC 50	Delay / Distortion / EQ / Looper / Modulation / Multi / Pitch / Reverb / Synth / Utility

Footswitches

P — bypass on CC 40
A — bypass on CC 41
B — bypass on CC 42

Special MIDI Functions

Tap Tempo — CC 43
Expression — CC 44
HotSwitch 1 — CC 47. Engage HotSwitch 1 — toggles Preset A's saved HotSwitch parameter snapshot on/off. Value ≥64 = engage, <64 = release.
HotSwitch 2 — CC 48. Engage HotSwitch 2 — toggles Preset B's saved HotSwitch parameter snapshot on/off. Value ≥64 = engage, <64 = release.
HotSwitch 3 — CC 49. Engage HotSwitch 3 — toggles a third assignable HotSwitch parameter snapshot on/off. Value ≥64 = engage, <64 = release.
Program Increment — CC 45. Cue up the next Program in the active Playlist. Does not load immediately — footswitch press required to confirm.
Program Decrement — CC 46. Cue up the previous Program in the active Playlist. Does not load immediately — footswitch press required to confirm.
Tuner — CC 51. Enter or exit the built-in chromatic tuner. Not accessible in Perform Mode.
Mode Toggle — CC 52. Toggle between SELECT Mode and PERFORM Mode.

Hardware Presets

The H90 Harmonizer has 99 hardware preset slots. Nitelite can save your current settings to a slot and recall slots via MIDI program change.