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MIDI
,→MIDI Tracks and Automation
* Note-Off
* Program Changes (PC's)
* Control Changes (CC's) (includes Bank Select and NRPN messages)
Notes are typically associated with MIDI controllers/keyboards or drum machines (or e-kits). For guitar, MIDI is useful to control devices, switching patches, switching effects on/off, or controlling effect parameters. PC's are used for changing patches, while CC's toggle and manipulate parameters. However, keyboards often come equipped with controllers that are designed to send CC messages - pitch and mod wheels, rotary dials, and sliders. As well as non-piano format notes: tap pads, and buttons.
===== NRPN (Non-Registered Parameter Numbers) =====
'''NRPN''' messages are special sequences of CC messages designed to access parameters on devices that have more than 128 parameters (max address size of a standard 7-bit CC message) or has parameters that do not correspond to the standard usage of the 128 available CC addresses.
==== Channel Mode ====
DAW audio tracks as well as MIDI tracks often provide a host of additional automation tracks for parameters you can control via MIDI CC messages, such as pitch, volume, or pan, as well as parameters for plugins on the track. These parameters can be assigned to a particular control on a MIDI controller and recorded live, or programmed via the DAW software.
MIDI tracks are often used exclusively to control other devices, such as modelers or MIDI enabled amps or effects units during live performances. This frees up the performer's feet from "tap dancing" on a foot controller and ensures all patch changes are accurate and perfectly in time with the beat. It can additionally allow control that would be physically impossible such as using multiple expression pedals simultaneously or stuttering a value up/down or on/off extremely fast.
=== MIDI Software ===
* SysEx support to alter synth engine
=== General MIDI Level 2 ===
'''General MIDI Level 2''' or '''GM2''' reconciled competing proprietary extensions to GM. It also included a number of additional standards to extend even further.