working principle of midi-interface

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. Working Principle of MIDI Interface 1

2. Presentation Outline 2

3. Introduction

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

5. Components of MIDI Synthesizer Sound generator (Various pitch, loudness, tone). Consists of microprocessor, keyboard, control panels, memory etc. Figure 1.1 Synthesizer

6. Components of MIDI (Cont.) Sequencer Stand-alone unit or a s/w program Storage server for MIDI data Has one or more MIDI IN’s and MIDI OUT’s Figure 1.2 Sequencer

7. Components of MIDI (Cont.) 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. Components of MIDI (Cont.) 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. Components of MIDI (Cont.) 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. Hardware Aspects of MIDI MIDI Connectors : Three 5 pin ports found on the back of every MIDI unit Figure 1.2 MIDI box

11. Hardware Aspects of MIDI (Cont.)

12. THE END