of MIDI (Musical Instrument
Digital Interface) is to
transmit information precisely describing the actions of a
performer on his/her musical keyboard.
It is a
description of the physical performance on a musical
keyboard. The MIDI language contains instructions like :
"Press on the 5th white key of the keyboard with a force
of 75%, Release this key 2.5 seconds later, Wait a 0.4 second
then press on the 7th key, press on the hold pedal,
It is a
descriptive language which contains a vocabulary of
elementary actions that the performer can execute, like
pressing and releasing a key of the keyboard, a pedal,
handling a button to change the sound, to increase volume...
file (.MID extension on PC) does not contain sound but
only instructions to create a piece of music.
It is the
construction plan of the house but not the house
itself. To hear the sound result, a sound synthesizer is
needed either, external to the computer (MIDI connected piano
or synthesizer) or internal (present on the sound card or as
a software synthesizer).
synthesizer transforms the MIDI instructions into audible
sounds via loudspeakers.
more about MIDI and music software in the Pizzicato manual!