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MIDI Functions
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MIDI is an acronym that stands for Musical Instrument Digital Interface, which allows
electronic musical instruments to communicate with each other, by sending and receiv-
ing compatible Note, Control Change, Program Change and various other types of MIDI
data, or messages.
The EZ-30 can control a MIDI device by transmitting note related data and various
types of controller data. The EZ-30 can be controlled by the incoming MIDI messages
which automatically determine tone generator mode, select MIDI channels, voices and
effects, change parameter values and of course play the voices specified for the various
parts.
MIDI messages can be divided into two groups: Channel messages and System mes-
sages. Below is an explanation of the various types of MIDI messages which the EZ-30
can receive/transmit.
Channel Messages
The EZ-30 is an electronic instrument that can handle 16 channels. This is usually
expressed as “it can play 16 instruments at the same time.” Channel messages transmit
information such as Note ON/OFF, Program Change, for each of the 16 channels.
System Messages
This is data that is used in common by the entire MIDI system. System messages
include messages like Exclusive Messages that transmit data unique to each instrument
manufacturer and Realtime Messages that control the MIDI device.
The messages transmitted/received by the EZ-30 are shown in the MIDI Implementa-
tion Chart on page 98.
Message Name EZ-30 Operation/Panel Setting
Note ON/OFF Messages which are generated when the keyboard is played. Each message
includes a specific note number which corresponds to the key which is
pressed, plus a velocity value based on how hard the key is stuck.
Program Change Voice number (along with corresponding bank select MSB/LSB settings, if
necessary).
Control Change Messages that are used to change some aspect of the sound (modulation,
volume, pan, etc.).
Message Name EZ-30 Operation/Panel Setting
Exclusive Message Reverb/chorus/DSP settings, etc.
Realtime Messages Clock setting
Start/stop operation
GM System Level 1
“GM System Level 1” is an addition to the MIDI standard which
ensures that any GM-compatible music data can be accurately played
by any GM-compatible tone generator, regardless of manufacturer.
The GM mark is affixed to all software and hardware products that
support GM System Level 1. The EZ-30 supports GM System Level 1.