Janie Cut File


MIDI - Musical Instrument Digital Interface
first introduced in 1983
not software or hardware, more a universal "digital language", means of communication for music technology, code language
instruments work with computers / each other
01011011 -> bytes (digital words) -> messages (note on/off, not number)
MIDI consists of performance infromation - like print music
MIDI is completely independent of audio - it is NOT sound
tells something else when and when not to use a sound
velocity measured 0 to 127
one keyboard functions as a controller, connected to another synthesizer
MIDI doesn't transmit audio sound
transmits info provided by the performer
what key is pressed and when, what pedals are pressed, etc

All messages:
Note on
Note off
Program change (go from one sound to the next)
Pitch Bend
Controller Change
Pressure (polyphonic)
Pressure (monophonic)

Midi Devices have three sockets
Midi In: recieves midi info
Midi out: transmits midi info
midi thru: repeats the same midi in signal

useing thru, more than one instrument can be controlled by a single midi output
Master instrument: instrument that sends info
Slave instrument: instrument that receives info

Midi interface: device used to connect midi to computer
translates midi data into a computer's own machine language

Midi OX - software emulator, allows you to connect multiple devices together through the computer itself
Data range for on/off messages between 0-127
Middle C is 60

Aftertouch - can detect a note being pressed harder after it is pressed

Most synths have two functions - performance mode and multi-timbre mode
Multi-timbre - more than one sound is being played
Performance mode plays one sound

General MIDI synthesizer: for every patch that a synth makes, it will be the same for every synth
First 8 are piano

Turning local control off
Disconnects an electronic keyboard from its internal sound generator
necessary when using a software or dedicated sequencer

16 MIDI channels, 10 is special
mutli-timbre instruments can play on many channels at once
10 is the universal percussion and drum channel

MIDI benefits: small file size
tempo and pitch are completely independent of each other
Find sections using measures and specific beats
performance and notation of a song (finale)

Sequencing: record midi data, plays back notes, a digital "piano player"
similar to a multitrack recorder
may also include digital audio recording