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Musical Instrument Digital Interface (MIDI) is a digital
communicationsinterface, protocol and compatible hardware
specification specially for theelectronic music. Within a
connected MIDI network, it allows multipleelectronic
instruments, performance controllers, computers, and other
relateddevices to communicate with each other and exchange the
performance messages.Besides, we could utilize MIDI to
transmit these messages of performance orcontrol events (such
as: playing a note, changing the program, varyingvolume,
panning to right or left, modulating a wheel ... etc.) to the
MIDIdevices to generate the wonderful music. In the world of
electronic music,MIDI provides us an integrated production
environment where we couldimperceptibly and completely
control the overall sound characters (such as:pitch, duration,
volume and timbre) of individual instruments and
otherperformance controlling parameters; thus, it enables us to
dedicate ourselvesto the creating of music and express our
music concepts to the acme. In thisthesis, we will do the study
of the arrangement of MIDI computer music and thetechnique of
the converting from MIDI files to Wave files. In the
multimediasystems, there are three audio media types:
MIDI, Wave, and CD-Audio;however, there are some
advantages for using MIDI architecture to producemusic, not
only matching the motif of multimedia application systems, but
alsobeing more changeful and belonging to the style of
yourself. For thepractical MIDI music production, we choose
the "Korg X5" synthesizer as ourinput device and performance
keyboard, which also provides sound module whileperforming
music; besides, we utilize the "MIDI-Express PC", which is
equippedwith 6 MIDI-IN and 6 MIDI-OUT ports, as the MIDI
interface to communicatebetween MIDI devices and the
computer and pick the "Cakewalk 3.0 Pro forWindows" as our
sequencer. Subsequently, we apply the basic music theories(
melody lines, rhythm patterns, accompaniment types, bass
running, fundamentalharmony, and chord arrangement... etc.),
MIDI basic concepts and principles,and MIDI arrangement
techniques and tricks (such as: editing of MIDI songs,the
arrangement and utilization of musical instruments and
effector... etc.)to produce some MIDI songs for verifying the
MIDI principles and arrangementtechniques mentioned in this
article. Besides, we experimentally try toconvert the
finished MIDI files to another audio specification: Waveform
fileformat using the TiMidity converter. For the converting
platforms, we choosethe SUN Sparc-2 and Sparc-10 two
workstations for executing the real-time andnon real-time
converting. By this way, we could do some discussions on
thecharacteristics and applicability between MIDI and Wave
audio files andcompare the quality difference of the music
files produced by differentfile formats or distinct sound
sources and then make our conclusions. MIDIcomputer music has
been widely used in the album, movie, animation
andmultimedia industry. Utilizing the techniques of MIDI,
the music composerhimself could create the music expression
which should be performed by a largeband before. To compose and
arrange the music using MIDI, we could express ourinspiration
to the acme. Due to the increasing requirement of quality
andquantity, it''s very urgent to combine the advantages of
MIDI music files andWave audio files and support each other.
TiMidity provides us one solution toconquer the disadvantages
of MIDI and Wave files and fully utilize theadvantages of
each other.
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