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101
Chapter 7. Connecting External Devices
■
Disconnecting the Internal
Sound Generator and
Keyboard (Local Control)
When connecting a MIDI sequencer, set Local Control to
“OFF.” The setting is at “Local Control ON” when the RG-7
is powered up.
As illustrated, information describing what has been played
on the keyboard is passed to the sound module over two
different routes, (1) and (2). As a result, you hear overlapping
or intermittent sounds. To prevent this from happening,
route (1) must be disabled, by setting the unit to what is
known as “Local Off.”
Local On
:
The keyboard and internal sound generator are connected.
Local Off
:
The keyboard and internal sound generator are separated.
No sound will be produced by the keyboard when it is
played.
→
When connecting a unit in the Roland MT series, you don’t
need to switch off Local Control. MT units transmit Local Off
messages when their power is switched on. If you first switch
on the RG-7, then the MT-series device, Local Control is
automatically switched off on the RG-7.
1.
Press the [Function] (Exit) button, getting its indicator
to light.
2.
Press the [Song] (Select -) button or [ ] (Select +)
button to display the MIDI screen.
3.
Press the [Song] (Select -) button or [ ] (Select +)
button to get the value for “Local” (Local Control) to
flash.
4.
Press the [ ] (Value -) button or [ ] (Value +)
button to switch Local Control on or off.
5.
Press the [Function] (Exit) button so the indicator goes
out.
■
Sending Tone Change Messages
(Program Change/Bank Select
MSB/Bank Select LSB)
A Program Change is a message that means “change to the
Tone of the specified number.” The device that receives this
changes to the Tone of the corresponding number.
When you choose a Program Change message (Program
Number), the Program Number will be transmitted to the
MIDI device connected to the RG-7. The MIDI device that
receives the Program Number changes the tone to the
corresponding Program Number.
Normally, the Tone is selected from the 128 Tones available.
Some MIDI devices, however, have more than 128 Tones.
With such devices, the Tone is selected through a
combination of Program Change messages and Bank Select
messages. There are two parts of a Bank Select message: the
MSB (Controller 0, with a value of 0–127) and the LSB
(Controller 32, with a value of 0–127).
* Some MIDI instruments can’t handle Bank Select messages.
Others can handle Bank Selects, but do not recognize the LSB
part.
(1)
MIDI
MIDI
MIDI
MIDI
(2)
IN
IN
OUT
OUT
Sequencer
Memory
Sound
Generator
Each note played is sounded twice
Soft Tru On
Local On
Local On
Sound is emitted
Sound Generator
Local Off
No sound produced
Sound Generator
Value Description
On
Local Control is switched on.
Off
Local Control is switched off.
RG-7_e.book 101 ページ ２００５年２月１４日 月曜日 午前９時４５分