MIDI (/ˈmɪdi/; an acronym for Musical Instrument Digital Interface) is a technical standard that describes a communications protocol, digital interface, and electrical connectors that connect a wide variety of electronic musical instruments, computers, and related audio devices for playing, editing, and recording music.[1] The specification originates in a paper titled Universal Synthesizer Interface, published by Dave Smith and Chet Wood, then of Sequential Circuits, at the October 1981 Audio Engineering Society conference in New York City.[2]

1. 1

2. 2
Introduction
Diagram of MIDI
Components of MIDI
Hardware Aspects of MIDI

3. MIDI stands for “Musical Instrument Digital Interface”
Includes communications protocol, digital interface
and electrical connectors.
Used to connect a wide variety of electronic musical
instruments, computers and related audio devices.
Can be used for playing, editing and recording music.
Provides a very low bandwidth alternative to the web

4. MIDI KEYBOARD
CONTROLLER
OR
COMPUTER (MIDI
Interface Card)
SPEAKERS
MIDI SOUND
MODULE
MIDI OUT
MIDI IN
AUDIO OUT

5. Figure 1.1 Synthesizer

6. Figure 1.2 Sequencer

7. • Track
 Part of sequencer
 Used to organize the
recordings
 Can be turned on or off on
recording or playing back
• Channel
 Used to separate information
in MIDI system
 16 MIDI channels in one
cable
 Channel numbers are coded
into each MIDI message

8. • Timber
 Quality of the sound. Ex:
Flute sound, Cello sound etc.
 Multi Timbral – Capable of
playing many different
sounds at the same time
Ex: Piano, Brass, Drums
etc.
• Pitch
 Musical note that the
instrument plays
 Ex: Pressing hard on the key
might produce high pitch

9. • Voice
 Portion of the synthesizer
that produces sound
 Synthesizers can have many
(12, 20, 24, 36 etc.) voices
 Each voice works
independently and
simultaneously
 Each voice produces sound
of different pitch and timber
• Patch
 Control settings that define a
particular timber

10. Figure 1.2 MIDI box

11. MIDI IN
• Receives all MIDI data
MIDI OUT
• Transmits all MIDI data it generates
itself
MIDI THROUGH
• Connector by which the device echos
the data it receives from MIDI IN

12. THE END