57
Chapter 6 Using MIDI
Chapter 6
While the use of MIDI allows various devices to communicate with
each other, this does not mean that it enables exchanges of all
information. The data that can be exchanged between any two
connected devices is limited to the messages common to both
devices.
Therefore, MIDI device owner’s manuals always contain a MIDI
Implementation chart, which allows the user to determine quickly
what MIDI messages the particular device supports. Comparing the
MIDI Implementation charts for each device allows you to confirm
what information can be exchanged and how to accomplish this.
Since these charts are uniform in size, you can overlay the charts for
the transmitting and receiving devices when checking the
information.
This section provides a simple description of how MIDI messages
are exchanged.

About MIDI Connectors

MIDI messages are exchanged via the connectors described below.
Connect MIDI cables to these connectors according to the use.
MIDI allows various different messages to be sent separately to
multiple MIDI devices over a single MIDI cable. This is possible
thanks to the concept of MIDI channels.
MIDI channels use an approach similar to that of television channels.
Switching channels on the TV allows the viewer to watch programs
from a variety of broadcasters. This is because information is
transferred over the channel to which both the transmitter and
receiver are tuned.
MIDI includes channels numbered 1–16; MIDI messages are
transmitted to (receiving) instruments set to the same channel as the
transmitting device’s.
About the MIDI Implementation
TransmitFunction
Fold here
MIDI Device A MIDI Device B
Recognized
Remarks
A separate publication titled “MIDI Implementation” is also
available. It provides complete details concerning the way MIDI
has been implemented on this unit. If you should require this
publication (such as when you intend to carry out byte-level
programming), please access the Roland web site.
http://www.roland.com/
Exchanging MIDI Messages

MIDI

Connector

Description

MIDI IN Messages from other MIDI devices are received
here.
MIDI OUT Messages from the VG-99 are transmitted here.
About MIDI Channels
Broadcasting
Station A
Broadcasting
Station B
Broadcasting
Station C
TV information from many different broadcasting
station is sent through an antenna.
Select the channel of the broadcasting
station you wish to watch.
VG-99_e.book 57 ページ ２００７年７月５日　木曜日　午前９時２２分