Music Instrument Digital Interface (MIDI): Initially conceived as a way to connect synthesizers, MIDI was developed as an open standard that synth manufacturers could adopt to insure compatibility across all brands of gear. One device is connected to another with a cable. Device 1 can send little packets of data across the cable to device 2. These packets are called messages. The messages tell device 2 what device 1 wants it to do.
There are many types of MIDI controllers out there. Simple ones generally just change presets. The more elaborate controllers can do complicated combinations of commands and clocking. Most pedalboard owners will likely use MIDI for only two functions: controlling parameters (knobs, switches, etc.) and changing presets.
Video Explanations:
Video: What is Midi And How does it Work?
Video: Chase Bliss – How to/Why to MIDI
Video: Introduction To MIDI For Guitar Pedals & How To Use It – That Pedal Show
Effect Pedal Examples:
Strymon TimeLine Multi-Dimensional Delay Pedal
Wampler Terraform Multi-Effect Pedal
Chase Bliss MOOD Granular Micro-Looper Delay
Common Components:
MIDI uses a 5-pin cable as shown to the right. Newer MIDI devices may use a USB port to connect to other MIDI devices so if a device doesn’t have the 5-pin ports, it may still be MIDI compatible.
Written Articles:
Premier Guitar Article: Intro to MIDI for Pedalboards
Article: What is MIDI and how can I use it?
Fifty Favorite Effect Pedals for Sale: