About This Item
Description
The Meris MIDI I/O converts standard 5-pin DIN MIDI to the TRS MIDI that Meris's compact two-footswitch pedals use, unlocking full MIDI parameter control, all 16 internal presets, and offline preset backup on up to 4 pedals at once.
What it does
The MIDI I/O is a compact, pedalboard-friendly interface that sits between a standard 5-pin DIN MIDI source — a controller, a DAW, or a computer — and the TRS EXP jack on a Meris two-footswitch pedal. Because the MIDI standard calls for active opto-isolator electronics, Meris recommends this box over a passive MIDI-to-TRS cable, which can suffer grounding issues, latency, or unreliable operation.
Compatibility
Made for the Meris Enzo, Hedra, Mercury7, Ottobit Jr. and Polymoon — the compact pedals whose EXP jack can be set to MIDI mode in the global settings. One MIDI I/O controls up to 4 Meris pedals, passing MIDI from the output of one pedal to the input of the next. It is not needed for LVX, MercuryX, Enzo X, or Ottobit X, which have their own built-in 5-pin DIN and USB-C MIDI.
Why players choose it
- Full MIDI CC control over every knob, switch, mode and expression setting on a connected pedal, not just preset recall
- Program Change 1–16 selects and enables presets 1–16 (the 4-button Preset Switch reaches only presets 1–4); Program Change 0 bypasses the pedal
- Unlimited offline preset saving and loading over SysEx, for backing up or sharing patches
- Give each pedal its own MIDI channel (1–16 or Omni) to control several pedals individually
- MIDI in/out activity status LEDs so you can confirm a connection at a glance
- Wireless operation possible with a separately sold Bluetooth MIDI adapter (Yamaha MD-BT01)
- Works out of the box with Empress pedals; Chase Bliss pedals need a custom cable
Connections & Power
- 5-pin DIN MIDI In and MIDI Out for your controller, DAW interface or computer
- TRS connection to each pedal's EXP jack (set the pedal's EXP mode to MIDI)
- Power: 9V DC center-negative, 2.1 mm barrel, 10 mA — any standard isolated pedalboard supply output easily covers it
In the Box
- Meris MIDI I/O
- One flat 11-inch TRS cable (connect additional pedals with your own TRS cables)
- Power supply not included
| Type | 5-pin DIN to TRS MIDI interface |
|---|---|
| Pedals controlled | Up to 4 Meris pedals |
| Connections | 5-pin DIN MIDI In and Out; TRS MIDI to pedal EXP jacks |
| Indicators | MIDI In and MIDI Out activity LEDs |
| Power | 9V DC center-negative, 2.1 mm, 10 mA (supply not included) |
| Included | Flat 11 in TRS cable |
| Dimensions | 3.7 × 2.6 × 1.5 in (94 × 66 × 38 mm) |
| Weight | 6.4 oz (181 g) |
FAQ
Which pedals does the MIDI I/O work with? The Meris Enzo, Hedra, Mercury7, Ottobit Jr. and Polymoon. LVX, MercuryX, Enzo X and Ottobit X have their own built-in MIDI and do not need it.
How many pedals can one MIDI I/O control? Up to four Meris pedals, with MIDI passed from the output of one pedal to the input of the next. Give each pedal its own MIDI channel to control them separately.
Does it unlock all 16 presets? Yes. Program Change 1–16 selects presets 1–16 on a compatible pedal; Program Change 0 bypasses it.
What do I need to set on the pedal? Set the pedal's EXP jack to MIDI mode in its global settings, then connect it to the MIDI I/O with a TRS cable.
Why not use a simple MIDI-to-TRS cable instead? The MIDI standard requires active opto-isolator electronics; passive cables can cause grounding issues, latency, or unreliable operation.
Can it go wireless? Yes, with a separately sold Bluetooth MIDI adapter (Yamaha MD-BT01).
What power does it need? 9V DC, center-negative, 2.1 mm barrel, about 10 mA. A power supply is not included.
Does it work with non-Meris pedals? Most pedals using TRS MIDI are compatible: Empress works out of the box, and Chase Bliss needs a custom cable. Check each pedal's manual to confirm how it passes MIDI.