MIDI compatible instruments send out binary codes that a computer can understand. All notes that a musical instrument is capable of playing are assigned specific MIDI messages according to what the note and octave are. For example, the Middle C note played on any MIDI compatible musical instrument will always transmit the same MIDI message from its 'MIDI Out' port. What code will be transmitted when a note is played is defined in the MIDI specification. This comprises the core of the MIDI standard that all instrument makers like Casio and Yamaha follow.

Since All MIDI instruments follow the MIDI specification and thus transmit identical MIDI messages for identical MIDI events such as the playing of a certain note on the musical instrument, all MIDI instruments can communicate with and understand each other, as well as with computers which have been programmed to understand MIDI messages using MIDI-aware software. The MIDI interface, converts the current fluctuations transmitted by a MIDI musical instrument, into binary numbers that the receiving musical instrument or computer can process.

All MIDI enabled instruments have a built-in MIDI interface. In addition, computer sound cards usually have this built-in interface - if not, it can be separately purchased as a card and easily installed.

So what does this MIDI standard contain? The MIDI standard consists of a communications messaging protocol designed for use with musical instruments, as well as a physical interface standard.

The Physical interface consists of a one-way (simplex) digital

current loop serial communications signaling at 31,250 bits per second.

The advantage of MIDI is that it is low bandwidth consuming and hence is good for networks and Internet. Today, MIDI has become the choice for mobile phone service providers to offer their consumers the latest ring tones. Music lovers can also enjoy their productions and edit them directly with MIDI software allowing them to have complete control on their work.

That is not all! This wonderful standard of communication can also be used for show control, theatre lighting, special effects, sound design, recording system synchronization, audio processor control and computer networking. Any device built with a MIDI out port can in theory control a device with a MIDI in port. This can only happen if the maker of both the devices has made provisions for the agreements between the 2.

In conclusion, the MIDI standard of communication has changed a lot of things. The MIDI messages are light weight packages that can be stored and processed with a minimum of fuss and power. This makes MIDI an invaluable format for musicians, game designers and network workers. MIDI is also excellent for show control helping in presentations and other corporate environmental work.