Roland GR-33 User Manual

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Chapter 9 Connecting to External Sound 
Generators and Sequencers
Connecting an external sound generator to the GR-33 makes 
it possible to play sounds not included the 384 built-in tones, 
and to create fatter sounds by combining notes from the GR-
33 and the external device.
The GR-33 can also serve as a convenient input tool for a 
MIDI sequencer (a device for recording performances). This 
chapter explains how to make such steps using external 
devices (and how to use MIDI functions).
About MIDI
What follows is a list of some of the different types of MIDI 
messages that the GR-33 can handle.
“Note On messages” provide information on what string 
was played, and its pitch and force.
“Note Off messages” provide information on when a 
string stops vibrating.
“Bend messages” provide information for changing the 
pitch smoothly, such as when bending, sliding, or 
hammering.
“Program Change messages” transmit commands for 
switching patches.
“Control Change messages” provide information on 
changes in volume and effects.
“System Exclusive (SysEx) messages” provide 
information for exchanging patch data with external 
instruments.
Controlling an External MIDI Sound Device
Connecting to an External MIDI 
Sound Device
Follow the figure below to connect the GR-33 to an external 
MIDI sound device.
fig.9-01
Setting MIDI Channel/Bend Range 
(BASIC CHANNEL, BEND RANGE)
Once you’ve made the connections, make the required 
settings on the GR-33.
 MIDI CHANNEL (BASIC CHANNEL)
When exchanging MIDI performance message with an 
external device, the GR-33 and the external device must be 
set to the same MIDI channel.
The channels available with MIDI range from 1 to 16. On the 
GR-33, you can choose to use one channel per string, for a 
total of six channels (Mono mode); or you can exchange 
information for all six strings on a single channel (Poly 
mode). In the case of Mono mode, you must specify the first 
channel (BASIC CHANNEL) of the six consecutive channels 
that will be used. Follow the steps described later to make 
the BASIC CHANNEL setting.
 
<About MIDI>
MIDI stands for “Musical Instrument Digital Interface,” 
a worldwide standard that enables electronic 
instruments and peripherals to share information about 
performances, sound switching, and other functions. 
MIDI is a standard that is shared by a wide range of 
instruments from different manufacturers. For instance, 
you could use a MIDI controller from company A to play 
a sound module from company B or send data to a 
sequencer from company C.
MIDI connectors (IN and OUT) are a standard feature of 
the GR-33. With MIDI, you can use the guitar to control 
external sound generators (such as synthesizers and 
samplers), or play the music you want to input into a 
MIDI sequencer.
Also, as we’ve already seen on p. 37, you can send data 
such as patch data to other equipment for performance 
or storage.
MIDI OUT
MIDI IN
External MIDI Sound Device