Meris MIDI I/O

The Meris MIDI I/O is a compact MIDI control interface made by Meris, designed to sit on a pedalboard and let a single MIDI source control up to 4 Meris pedals. It takes standard 5-pin MIDI data and translates it to 1/4-inch TRS connections, and it does so bidirectionally, meaning MIDI data can travel both ways between your controller and the pedals. Meris describes it as "the ultimate midi control interface for all of your Meris pedals and more."¹

What it does and how it connects

Many Meris pedals use a 1/4-inch TRS jack for MIDI rather than a 5-pin DIN socket, which is what keeps their enclosures small. The MIDI I/O bridges the two worlds: it accepts 5-pin MIDI data from a controller, a MIDI-capable pedal, or a computer interface, and translates it to TRS 1/4-inch jack I/O. Because the translation is bidirectional, the connection works in both directions, which matters for tasks like sending preset changes to pedals and receiving data back.²

For wireless setups, Meris lists compatibility with a Bluetooth MIDI adapter, specifically the Yamaha MD-BT01, which is sold separately.¹

Power and size

The MIDI I/O runs on 9V DC center-negative power through a 2.1mm jack and draws 10mA, so it fits comfortably on any standard pedalboard power supply. It measures 3.7 inches wide, 2.6 inches deep, and 1.5 inches tall, and weighs 6.4 ounces.¹

Background

Meris showed working prototypes of the MIDI I/O alongside its 4 Preset Switch in August 2017, with availability announced as Winter 2018.² The company states that the unit is designed and built in California, U.S.A.¹

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