Meris Hedra — MIDI Editor & CC Reference
Control the Meris Hedra from your browser — MIDI control reference, interactive editor, and AI-generated presets. Free, no install.
Explore the Hedra controls in your browser and connect compatible MIDI hardware to send settings to your pedal. The reference below shows the controls mapped in Nitelite; available functions depend on the pedal and firmware. The default MIDI channel in Nitelite is 1. Browser MIDI control works in Chrome, Edge, Opera, or Brave — no install required.
Knobs
| Control | MIDI CC | Description |
|---|---|---|
| KEY | CC 16 | Selects key for diatonic harmonies; max position for chromatic shifting |
| MICRO TUNE | CC 17 | Slightly detunes all three pitch-shifted voices |
| MIX | CC 18 | Balance between dry and wet signal |
| PITCH 1 | CC 19 | Interval for the first pitch-shifted voice |
| PITCH 2 | CC 20 | Interval for the second pitch-shifted voice |
| PITCH 3 | CC 21 | Interval for the third pitch-shifted voice |
Alt / Secondary Knob Functions
| Control | MIDI CC | Description |
|---|---|---|
| SCALE TYPE | CC 22 | Selects scale type: Major (0-11), Minor (12-37), Melodic Minor (38-58), Harmonic Minor (59-78), Double Harmonic (79-97), Lydian Pentatonic (98-119), Minor Pentatonic (120-127) |
| PITCH CORRECTION + GLIDE | CC 23 | Low values = no correction, mid-low = loose correction, mid-high = strict correction, high = pitch glide amount |
| FEEDBACK | CC 24 | Delay feedback amount — in Series modes Pitch 3 sets the loop; in Dual modes Pitch 1 and 3 both feed back |
| TIME DIVISION 1 | CC 25 | Delay time fraction for voice 1 relative to tap tempo |
| TIME DIVISION 2 | CC 26 | Delay time fraction for voice 2 relative to tap tempo |
| TIME DIVISION 3 | CC 27 | Delay time fraction for voice 3 relative to tap tempo |
Switches
| Switch | MIDI CC | Positions |
|---|---|---|
| DELAY MODE | CC 29 | Series + Pitch Fdbk / Series / Dual + Cross Fdbk / Dual |
| PITCH CONTROL SMOOTHING | CC 30 | Off / On |
| VOLUME SWELL | CC 31 | Off / On |
| HALF SPEED | CC 9 | Normal / Half |
Footswitches
- TAP — CC 28
- BYPASS — CC 14
Special MIDI Functions
- Tap Tempo — CC 28
- Expression — CC 4
- Tempo — CC 15. Sets delay tempo directly via MIDI in 10ms intervals (0 = 0ms, 127 = 1270ms). Overrides tap tempo.
Hardware Presets
Hedra has 16 hardware preset slots, recalled using MIDI Program Change. Saving requires an action on the pedal; follow the hardware preset manager instructions.